He has a small lump on one side of his stomach. I tried to get a few photos but found my camera dead, so I will later. No possibility of being impacted; unless it was from food which it should not have been anyway. He is eating and pooping regularly and still energetic. His temps were a bit high today (around 99) which I didn't realize but he spent most of the day on his cool side. Neglect on my part. He hasn't been dropped or otherwise physically injured. I know you're likely going to say take him to a vet. I'd like to see if there's something I may have done first, though, that I can correct.