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This is very accurate. You need to be careful with medicated feed as amprolium kills coccidiosis by denying them access to thiamine (vitamin B1) by blocking its uptake in coccidia. It also has that effect on the chicks as well.I seem to recall @Royal Chick saying B12 and Vit E.
Found this online:
“
Wry neck can be a symptom of a Vitamin B1 (thiamine) deficiency.
Chicks can be more prone to a Vitamin B1 deficiency if they are fed medicated chick feed for too long. The coccidiostat Amprolium in medicated chick feed can inhibit the absorption and utilization of Vitamin B1.
Chicks can also be more prone to dietary deficiencies if their parents’ diet was deficient in vitamins as well”
https://grubblyfarms.com/blogs/the-...vkAInnzpVm8y6GPyW9Vf5BwCRM-wzzxS-A4mo6jCvXPbH
Best practice says to switch chicks off medicated feed at 6 weeks. You should gradually change the feed from 100% medicated to 100% non-medicated over a period of 10 days. The gradual changeover allows the birds to develop immunity to coccidia and thus also prevents the disease.