A barn floor/foundation is going to crack or not on its own, animals or not. depends on its age and how it was installed and so forth. My barn has always had horses in it and it has a cracked foundation. I imagine his theory is based on having the heat inside the building so water cannot get into holes and then turn to ice and make cracks. Or something like that. My husband is a home inspector and he laughed when I read your post. He said "thats a new one"
