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Benefits of not using medicated feed:
1. The medication in the food blocks niacin absorption (to prevent rapid cocci growth, since cocci absorbs niacin to grow). Apparently niacin is necessary for energy and thinking and a deficiency causes intolerance to cold. There are diseases from lack of niacin that can kill. Severe deficiency of niacin in the diet causes the disease
pellagra, which is characterized by diarrhea, dermatitis, and dementia, as well as “Casal's necklace” lesions on the lower neck, hyperpigmentation, thickening of the skin, inflammation of the mouth and tongue, digestive disturbances, amnesia, delirium, and eventually death, if left untreated. This is in Humans. I wonder what it will do to chickens? Especially teeny growing chickens? We have had problems with SFH having curled toes that may be linked to medicated feed - that was when I stopped feeding it.
2. Using Flock Raiser instead of medicated feed means that everybody can eat the same thing so I don't have to separately feed the broody hens and the chicks and the growing birds. It is also less expensive.
3. The birds get their immunity from their bodies - not from medication. I think it makes for stronger birds in the long run. Just a theory so far. They seem to not only get immunity from cocci but possibly from other things, no medications needed so far this year. Very healthy happy birds.
4. I ferment my feed. I am not sure if that would negate the medication effects, and I know it allows for more of the protein to be used so it might allow more of the niacin to be used as well.. I don't know.
With medicated feed you can still have problems and it will kill chicks if not treated when they show signs. The medication is at a low dosage (to prevent the serious niacin deficiencies) but sometimes its not enough. The chicks I lost to cocci were on medicated feed.
If somebody wants to do a side-by-side study of feeding the two different feeds to a single batch of chicks, I would be interested in the outcome. Until then I think so far my "new" method is working better than my "old" method - so I will stick with it.