Influence of Different Levels of Certain Essential Amino Acids on the Performance, Egg Quality Criteria and Economics of Lohmann Brown Laying Hens

Good Morning Dr. Mahrose I assume amino acids are quoted as Total; do you have SID values for M+C and Lys? Thanks Martin

Dr Khalid, I would like to make some remarks about the work that I think are pertinent; - evaluating amino acid levels in total and non-digestible values, compromises the work. This is because changes in the composition of the feed, mainly in the protein source, evaluating these same levels of amino acids, the results will be different from those obtained in this study, due to the variation in the digestibility values of the amino acids. between foods ..; - it should also be considered that, in all the levels of lysine evaluated, the other levels of essential amino acids, with the exception of sulfur, should, at least, be at the levels corresponding to their relationships proposed in the ideal protein for the animal category evaluated. I think that these considerations can only compromise the scientific character of the study.

Yes Recently I observed that the egg my birds are laying were not brown as before they getting whitening. I would like to know what could bring the sudden changes .