We already tested many multivalant serotype vaccines in broilers and pigeons, best challange protection is obtained by oral vaccines using potent adjuvants based on ISCOM technology
These vaccines induce protective IgA and GALT and MALT response and protect 12-16 month depending on salmonella pressure.
If this is used together just before immune gap with probiotics 7-8 strains specially isolated from birds, all strains have different antibiotic resistance so these will stabilize the intestinal flora and make intestinal flora little acidic in many case bacterial problems are solved
For evaluation we have two products available one for reducing heamolitic coli and one for Salmonella
If you like to receive more information about these studies or products or if you want to work together let me know.