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The impact of crude fibre concentrate on footpad dermatitis in broilers

Published: January 16, 2015
By: Dr. Manfred Pietsch (J. Rettenmaier & Söhne GmbH & Co KG)
Footpad dermatitis is a common problem in poultry. Severe cases of footpad dermatitis have a negative impact on animal welfare as well as on the commercial result of broiler units. The quality of the litter is unquestionably a major impact factor on the development of footpad dermatitis.
A combination of wet litter and unspecified chemical factors in the litter are thought to be the major cause of the footpad dermatitis. Beside disease, animal bedding and the housing management, the feed has a major impact on the litter quality.
Feed additives have been established to address wet litter problems, i.e. NSP-enzymes. Another approach is the use of a crude fibre concentrate. There is evidence that fibrillated insoluble lignocellulose has a positive effect on the litter quality and on the performance of the animals, respectively. 
Footpad dermatitis
Footpad dermatitis, also known as plantar pododermatitis is a condition characterised by lesions of the ventral footpads of poultry. It is a type of a contact dermatitis affecting the plantar regions of the feet. The lesions can develop in less than a week.
These lesions cause the birds serious pain and therefore the pododermatitis is an animal welfare issue.
Apart from animal welfare issues the contact dermatitis has a negative impact on the commercial results of the poultry industry. It has been shown that broilers with severe footpad dermatitis have a reduced weight gain.
Additionally, there are observations that footpad dermatitis is often associated with breast blisters and hock burns. Finally, the lesions can be a gateway for bacteria which spread via blood and cause joint lesions and other serious health related problems.
In some Asian countries the intended use of the feet is for human consumption. Feet with serious lesions will not be consumed. 
The HPC fibrillated insoluble crude fibre concentrate Arbocel (left) compared to wheat bran (right) at 50x magnification.
The impact of crude fibre concentrate on footpad dermatitis in broilers - Image 1
Wet litter
The so called ‘wet litter syndrome’ in poultry causes significant commercial damage. According to Butchers & Miles (2009) litter quality is one of the key factors in poultry production.
If litter quality is not kept at an acceptable level, very high bacterial loads and unsanitary growing conditions may result in odours (including ammonia), insect problems, soiled feathers, footpad lesions and breast blisters.
In a well managed broiler house, litter moisture normally averages between 25-35%.
In northern European countries wet litter is often prevalent in winter, as very low outside temperatures and necessity to heat make sufficient ventilation virtually impossible, while maintaining an ideal indoor temperature for the broilers. In some Middle East countries, as well as in South East Asia, wet litter issues can be observed throughout the whole year, due to the high air humidity. 
Feeding strategies
Feed related causes of wet litter are well summarised by Butcher and Mills (2011).
Diarrhoea can be caused by dietary components and/or infectious agents. A well established approach to control the infectious agents is the use of acids via feed/water or the use of antibiotics, in countries where they are still approved feed additives.
High intake of the minerals potassium, sodium, magnesium, sulphate or chloride can lead to excessive water consumption and wet droppings. When wet litter problems occur, feed levels of sodium and chloride (salt) should be determined. It is possible that a feed mixing error has occurred, resulting in excess salt in the diet. The water should be checked periodically for quality and mineral concentrations, especially for sulphate and magnesium.
Dietary fat of poor quality or rancid fat can lead to wet faecal droppings. Likewise, using feed ingredients such as wheat, barley, rye or cassava often results in excessively wet droppings. In this case it is recommendable to use a commercially available enzyme preparation.
It is well established that high levels of mycotoxins in the feed can irritate the digestive tract.
Additionally, marked pathological changes in the kidney might occur resulting in higher water excretion.
Feed mills are well aware of this and control the feed for several mycotoxins before use. If the mycotoxins exceed a certain level the raw material is refused. In order to ensure a proper feed quality, mycotoxin binders are regularly included in the feed formulation. 
Crude fibre concentrates
Crude fibre concentrates (CFC) describe products with a crude fibre content of at least 60%. The high fibre content is achieved by concentration processes of physical or thermo-mechanical nature. CFC are usually based on a lignocellulosic or a cellulosic fibre.
The CFC Arbocel has a very high water binding capacity. The product binds the water in the upper part of the intestine and releases the water in the lower part of the intestine by osmotic pressure.
Therefore the water is available for reabsorption and will not appear in the litter. Additionally, insoluble fibres speed up the transit period of the digesta in the small intestine. Thus, harmful bacteria cannot colonise and produce endotoxins, which often cause a release of water into the lumen. 
Table 1. Trial design.
The impact of crude fibre concentrate on footpad dermatitis in broilers - Image 2 
Table 2. Broiler weight at different stages of the fattening period
The impact of crude fibre concentrate on footpad dermatitis in broilers - Image 3
The insoluble HPC fibrillated CFC Arbocel has been intensively investigated in the last couple of years. Professor Farran from the American University of Beirut demonstrates in several broiler trials that the use of 0.8% Arbocel in the feed reduces the litter humidity about 10%. This result has been confirmed in layers at the La Trobe University in Australia.
The occurrence of footpad dermatitis was not recorded in the trials mentioned above.
In order to show the direct impact of Arbocel on footpad dermatitis, a study at the University of Applied Science in Osnabrück was conducted. This trial evaluated the effects of 0.8% Arbocel in a commercial broiler diet on performance, footpad dermatitis and the litter humidity. Two independent replicates with about 76,000 animals each were evaluated.
The design of the first replicate is shown in Table 1.
Table 2 shows the weight of the animals. Arbocel caused a significant improvement in weight gain after 10, 21 and 33 days of trial duration. This higher weight gain confirms earlier observations of the University of Applied Science in Bingen, Germany 
Table 3. Litter dry matter (litter based on spelt hulls).
The impact of crude fibre concentrate on footpad dermatitis in broilers - Image 4
The American University of Beirut conducted digestibility trials including Arbocel. They observed an improvement of the protein and essential amino acid digestibility by 5-7% due to the use of Arbocel. This might explain the improved performance observed in the Osnabrück trial.
Tables 3 and 4 show the litter humidity and the scoring of footpad lesions. Until day 21 there was clearly reduced litter humidity in the Arbocel group. At the end of the trial the litter humidity was similar. However, the footpad scoring shows a significant improvement concerning the footpad lesions at the end of the trial at day 33. 
Table 4. Footpad lesions according to Mayne (2007): 0 = no footpad lesions; 7 = more as 50% of the foot with necrotic tissue.
The impact of crude fibre concentrate on footpad dermatitis in broilers - Image 5
This observation may lead to the conclusion that the litter humidity during the first 21 days of the fattening period is the most relevant to avoid serious footpad lesions.
During this period it is therefore obligatory to control the litter humidity via feed (starter and grower feed). The use of insoluble CFC is highly recommended in this period.
This trial was repeated in the same barns, with cross over design in order to avoid influence of the housing units. By doing so the researchers made sure that the effects are archived by the dietary treatment and not by the barn.
The second replicate with the same number of animals was conducted from 1st March-4th April 2013.
The observations from the first trial were confirmed. Arbocel caused significantly better performance, lower litter humidity until day 21 and an improved situation concerning the footpad lesions. 
Summary and conclusion
Footpad dermatitis (pododermatitis) is a serious problem in poultry. It negatively affects animal welfare, as well the economic output in broiler units. Wet litter is one of the main causes for the development of footpad dermatitis.
It is important to control the wet litter by well established management tools like ventilation. On the other hand, feed quality and formulation (salt level, mycotoxins) can help control wet litter as well.
New trial results from the University of Applied Science in Osnabrück confirm that the HPC fibrillated insoluble crude fibre concentrate Arbocel is a good tool to control litter humidity as well as development of the footpad dermatitis. The results show that the control of litter humidity is especially important during the first 21 days to control the development of footpad dermatitis.
This article first appeared on the International Poultry Production Magazine, Positive Action Publications Ltd. Volume 21 Number 7,  2013. 
Related topics:
Authors:
Dr. Manfred Pietsch
JRS - J.Rettenmaier & Söhne
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 Dr. Gregus Zoltan
Phytobiotics
17 de marzo de 2015

Dear Maheswar Rath, 

Yes, ARBOCEL is a comercial product and you can buy it in India and in almost all countries in the world.
The crude fiber Content of ARBOCEL is 70 % (in the dry substance) and this is 100 % insoluble fiber. Or we have the NDF values - 97 % of ARBOCEL is NDF.

Yor are 100% right - the foot pad dermatitis is a litter moisture Status linked issue - significantly correlated.

The depth of the litter, ventilation, in some places also heating etc. can help to control the litter humidity, but if you manage trough the feeding to reduce it you do not have to ventilate, use so much bedding etc.

You are also right that the water consumption affects the litter humidity.
BUT if you reduce the soluble fiber content of the feed you will reduce also the water consumption (see the comments in my last posting).

It is well known that fibers binds watter -The famous water binding capacity WBC. But soluble fiber binds water and increase the viscosity. In this process soluble fiber with water turns to a gelatinous, viscous substance which has a cage effect. This gelatinous substance closes the nutrients and the enzymes cant reach them - in consequence the nutrients are not digested. In adition the water stays binded and goes out with the feaces.

On the opposite, in ARBOCEL binded water is free and in the last part of Intestine the water (and vitamins, minerals, nutrients etc) is reabsorbed. In consequence, the water consumtion is not higher, the feaces are dryer and the litter moisture is lower.

It´s also well known that the insoluble fiber holds longer the feed in the gizzard. If the feed is staying longer in gizzard the pH is sinking, which helps the protein digestion. This acid environment "cleans" the feed from bacterias etc. and the feed continues his way to intestine cleaner. ARBOCEL particules are so small that they fit between the intestinal willies and estimulate the growht (we did mesured this). This two factors helps to develop a healthier intestine which makes the intestine more resistant and so less diarrhea and less humidity in the litter, less medication is needed etc.

I would also like to add that the higher viscosity (means soluble fiber) holds longer the digesta in last part of intestine where the bacterias have more time to colonize etc. which means less healthy intestine, more diarrhea, less digestibility - just problems

Best Regards

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Maheswar Rath
13 de marzo de 2015
Arbocel is a commercial product? there need to be nutritional tables showing NSP from different ingredients incorporated in the feed formulations showing soluble and insoluble fiber or in percentage . However foot pad dermatitis is a litter moisture status linked issue. We can look to deep litter status and the optimum depth of litter and ventilation of the shed for balancing the wet litter issue. Some report say water quality and quantity can also contribute to wet litter status. Bacterial infections due to several management reasons can also induce diarrhea contribute to wet litter. NSP are now focused for making feed better utilized though use of enzymes to some extent which may take care . Thank you for a good interpretations and suggestions sir. m rath.
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Tawfik
9 de marzo de 2015
thank you Dr. Gregus Zoltan
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 Dr. Gregus Zoltan
Phytobiotics
9 de marzo de 2015

If you like, you can read more about the fiber in poultry Nutrition, here

do dubt that with some other products you can reach some similar result like with fiber.
But let me try to give you some short coments:
Animals as we, do have fiber requirements. In some countries (for Pigs in Germany and Holand) there are by law regulated the Minimum fiber Content in the feed. There is a tendency that this will be a case soon also in poultry.

There are some "old" (with all due respect) meaning that the fibre in feed is not needed, or there is enough etc. But today is well known that this is not correct. There is not just need for the fibre but also there is a big difference between different fibre sources and also there are different fibers. SOLUBLE and INSOLUBLE

Fibers are two completely different ingredients
Advantages and disadvantages of soluble fibre:
Lowering intestinal passage rate
Reduces digestion of fat, protein and starch
„Prebiotic“ effect
Energy source for monogastric animals
Affects viscosity of the digesta
Mainly fermentable parts
Reduces dry matter of faeces
Binds nutrients (pectin)

Advantages and disadvantages of insoluble fibre:
Structurising“ fibre
Improves starch digestibility
Increased intestinal passage rate
Poorly fermentable
Stimulation of intestinal villi
No energy source for young monogastrics
Increases dry matter content of faeces
Prevents cannibalism

There are many, many publication about fiber in animal nutrition but I would like to comment one, which is showing clearly the difference between the soluble and insoluble fibers:
At the Aarhus University in Denmark, Sana Steenfeldt and her colleagues in 2010, compared the effect of three different feed formulations on selected health related parameters in broiler breeders. A low fibre control formulation (Total Dietary Fibre 3.03 %) and two high fibre formulations (TDF 4.19 and 3.75 %). The 2 high fibre formulations differed mainly in the ratio of soluble/insoluble fibre. One was high in insoluble fibre (insoluble NSP 90% of total NSP) and the other contained more soluble fibre (insoluble NSP 79% of total dietary fibre). The formulation containing high fibre with an elevated proportion in soluble fibres caused significant problems with wet litter.

The Litter dry matter (%) was 41a by Control group (low fibre), 70b by High fibre group (insoluble) and 25c High fibre group (elevated level soluble). Hereby a,b and c: means differ significant (p<0,001).

This trial clearly demonstrates that the nature of the fibre has significant impact on the litter quality as the proportion of soluble and insoluble fibre showed more impact on the litter humidity than the fibre level per se. Consequently there should be as much insoluble fibre in the formulation as possible. An increase of 10% soluble fibre resulted in an increase of 45% moisture in the litter. The final moisture content of 75% is by far too high. This will cause serious health problems in the birds.
Additionally the authors observed that a high level of soluble fibre causes some behavioural disorders. Already 4 hours after feeding 30 % of the birds with the elevated levels of soluble fibre showed retarded necks. A sign of discomfort. There was almost no retarded neck problem (<10%) in the birds fed a low level of soluble fibre.

Beside of the effect on litter Quality, ARBOCEL (insoluble fiber concentrate, contents 70 % crude fiber), the Protein digestibility is improved (about 5 %, not just in poultry, but pigs and other species), there is norisk of mycotoxin, by Broiler breeders less feather peacking, less dirty eggs, more hatching eggs, Higher hatchabiltiy, In Broiler breeders low densitiy feed formulations deliver some beneficial effects for healt and Performance. To achive these los density formulation a Dilution with fiber is required. The applied fibre should mainly be insoluble because as above showed, the soluble fiber may cause massive Problems with wet litter.

if you have some more questions or you Need more Information please contact me Zoltan.Gregus@jrs.de
Best Regards


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akhalakahemad A. Nathametha
23 de febrero de 2015
I have capacity of 100000 poultry broiler.. but some day problem with crd disease and lose the weight of broiler.. how i could treat the poultry broiler and how to increase the weight propotional to fcr
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John Matcham
Agrilamp
13 de febrero de 2015

We have been running studies now for the past year which include monitoring litter condition, the previous comments are all good, in particular "good enzyme". What is interesting is that if the bird itself has a good digestive process less of the bi-products that produce poor litter will be present. Key is excessive water consumption by the bird. Our results are now confirming what we have thought for one time, in that our birds generally consume more water than actually required to digest and process food while maintaining a healthy level of hydration. On average we are seeing a reduction in water intake (naturally not forced) produces a much improved gut function and subsequently a dry friable litter. As a result that is quantifiable, we are seeing up to 75% reduction on carcass rejection at processing. The research is ongoing and will continue for the next three years under Scientific conditions on a full commercial farm testing across 8 buildings. Using a lower intake as the norm, water intake is also now considered as a good indicator of stress in flocks. There are many other advantages that we are seeing and due to contractual constraints I am not yet able to tell you more. But it has been repeated successfully after a total of 32 flocks.

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Maheswar Rath
11 de febrero de 2015
Nice article i have gone through. CF and products suggested can do control of dermatitis of foot pad . From experience i have seen mostly the breeders kept on litter with high body wt are more susceptible foot pad lesions. Nutritional formulations are always monitored for CF levels with much balance. Any processed crude fibers also cost to formulation until it is visible. Enzymes are good option to make the formulation less costly due to it.s ability to digest the NSP to some extent. One point can be checked if wet litter is observed significantly in the shed which induces all problems due to bacterial impact. So person handling the formulations need to know what he is feeding and the impact for any corrections. However manege mental ideas can also reduce wet litter environment and deep litter term is used to keep the litter deep as far as possible for good capillary action with water holding capacity till ventilation with temp are corrected as threshold point. I hope product suggested can support to the views expressed through experiments.
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Hisham AlAli
9 de febrero de 2015
This is very good as more and more fiber is being well proven to be an important element of healthy and modern nutrition. I want to have the full publication form the author if that is possible. It is believed that fiber may actually do more than this specific issue in terms of health and productivity. Wet litter is only a sign, once it is eliminated from the roots, further improvements should be seen expressed in health and performance. Good work!!
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Dr.v.rajendra Prasada
20 de enero de 2015
If we use good enzyme in the feed wet litter can be controlled successfully.
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