So I have two new bantam pullets that I got just about 2 weeks ago. They are in quarantine in my garage. So far they look good--nice appetites, bright eyes, no signs of respiratory issues, no mites or lice. However, they have what I can only describe as sour smelling poop. It is normal looking, but it smells completely different than my other chickens' poop. At first I thought that it had something to do with what they had been eating before I got them and that it the odor would "normalize" once they had been on my feed for a while. Well, it has been a while and their poop still stinks. Is sour smelling poop a symptom of something?