Ok, this is bugging me. I noticed a bump on Ender's chest/belly area on his left side just before I left for NYC last week and left him with YellowLabProject (who was an amazing Ender-sitter btw). When I got back, I noticed it was bigger than the walnut-sized bump it was before. Not it's about golf-ball sized. It's hard, not squishy, or soft. It doesn't seem to irritate him when I touch or feel it. He hasn't been acting TOO much stranger than usual lately (aside from peeing on my leg just before leaving him with YellowLabProject...grrrr). He seems a little mopy over the last two days except when he's on his walks. I can't for the life of me think of what it could be and it's got me worried. I'm taking him into the vet tomorrow to get it checked out. I just wonder if anyone has any insight so I can sleep a little better tonight.