I gave my 2 young ND goats an XL igloo. I keep it clean, stuffed it with nice straw and cedar and make sure I seal in the drafts every day while they munch the yard. I took out the bottom so their hooves didn't slide around, and they slept in it for about a month. Then.. They stopped. They would rather freeze together in the corner of the pen. I remade it, (nope,) then completely emptied it and moved it yesterday, wondering if the ground underneath smelled of urine and it bothered them. (Still nope.) Today I took it out of the pen while they grazed, powerwashed it, used kennel cleaner, dried it with a towel and repacked it full of nice fluffy straw. NO! They play on it, walk in it, dance on it, jump over it, around it, WTH?! I even went inside and I'd totally take a nap in there! Any ideas? It's getting cold here in New England. I'm tempted to buy another one to see what they do. I just can't imagine what's suddenly wrong with it.