Apparently Homer wasn't too happy about being put in the crate to get his nails trimmed this morning, and he let me know it by using the crate as his litter box before we got back home.
Don't let the pathetic expressions fool you. He was disgusting and covered in bathroom mess, and Kevin was not at home, so it's me you should feel sorry for. Thank goodness his nails were freshly trimmed. I don't want to imagine how shredded I would have been otherwise.