10 year old Cavapoo, never had any health issues. Recently he’s been showing his age, no jumping up on the bed, not lasting as long on walks. Finally got him up to date on vaccines so he could get a proper grooming. Well, discovered this lump on his rump. The groomer didn’t mention it, he JUST went to the vet and they didn’t catch it either. Anyways, it’s gotten bigger overnight, he seems like he’s in pain. It is squishy and not hot to the touch. My dad is taking him to the vet while I work a 16 hour shift. Please, does anyone have any ideas?