A couple weeks ago we found out that one of our dogs had a tumor. It was the size of a large melon and was on his spleen. The spleen was removed and all was well. Now our second dog, the older of the two, started limping, leaning, and panting last night. She was taken to the vet and they found that she had a tumor on her liver. Apparently it had ruptured. When I saw her today she had gone blind and could barely catch her breath. The other dog was in the same room as her when she was put down because he had to get stitches removed.