Marmalade is just coming up to 1 year old and I found a lump on him today, just kind of above his... pee hole? It's pretty large in size and feels fairly solid but not rock hard. He doesn't react when I touch it, and it definitley wasn't there 2 days ago. He's otherwise acting as normal and eating as normal. I'll definitley be taking him to see a vet as soon as I can get an appointment, but my first thought was it was a tumour. Any ideas?