I gave my silkie the whole pill. I'm not sure on the diarrhea. I personally would try it again tomorrow and if she has diarrhea again maybe not give her as much.
Give her b complex pills cut in 1/3. You just open her beak and push it in and she will swallow it. then give her vitamin E gel pills you just pop it open and put it on her beak. Do this once a day. I tried the goat selenium with multiple different chickens over the years and it never helps...
This little silkie is about 14 weeks old. I found her shaking her head down on the ground on Friday. So I moved it back to the brooder. I also put another chick in there with her so she isn't all alone. I started giving her selenium and vitamin E. After I give her the medicine she will perk her...