How to prevent and treat vitamin B1 deficiency in chickens?

Prevention and treatment of vitamin B1 deficiency in chickens: First, supply enough vitamin B1 in the chicken's diet. Adding 0.8 to 0.9 mg per kg of feed for growing chickens and adult chickens, and 1.5 mg per kg of feed for chicks, can prevent the occurrence of this disease; second, for chickens that have already developed the disease, intramuscular injection of thiamine 5 mg (the amount for one chicken, once a day), used continuously for 5 to 7 days, gives an extremely good therapeutic effect.