Details, we need details. What kind of animals? The area to be heated..... does it have a concrete floor? A chimney? How much space are you hoping to heat. How much space does the stove have?
You need to keep the stove 36" from any combustible. The chimney heeds to be at least 14-16 feet tall. Cement is best, but metal-bestus would be OK.
I;m the guy that heats sheep and goats. We just keep it above freezing. It's more to keep the water from freezing than it is to keep the animals warm. It's a pain to spend 10 minutes twice a day busting ice from water buckets so we aim to keep it 35 in the barn. It does seem to help the critters if they have babies when it's 20 below zero. One thing though.... if you choose to heat, you MUST heat all year. If you keep it above freezing half the winter, then stop, the animals may not be prepared. With no heat at all they grow more hair, they get acclimated. To suddenly go from 35 to 20 below might not be good.