Now, however, there are tags animals pets and chickens. To disagree with @Grace@Grace's conclusion - it seems that most uses of animals is in the livestock sense. I think that animals is too generic to be useful, because it would include pests, predators, and pets. Perhaps you can keep something like an ecosystem tag, remove the animals tag, add livestock and disallow species tags.
It seems to me that if you are getting too many breed-specific questions, that those will probably have to migrate to something like the proposed Agriculture SE.