So I have three two-weekers: Two red sex links and one plymouth rock. The rock and one of the sex links have diarrhea. The rock's i sort of yellowish and the sex link's is the normal color, but runny. Should I take them to the vet?! Is it lethal? The rock has a bit of poop stuck to the feathers underneath her butt, but it's not blocking anything as far as I can tell… Please help!!! I've never had chickens before and I am totally not prepared for this!!!! PLEASE HELP!!!!!