I'm very, very sad. We have two pets - Tulip (a lovely lop rabbit) and Lester (a portly gentleman guinea pig). I know most people don't get extremely attached to rodent-like pets, but we're not allowed to have a cat or a dog so they are very, very dear to us. A few days ago we noticed a lump on Lester's belly. He didn't even seem to notice it was there, and cysts are very common in guinea pigs. I took him to the vet this afternoon to have the cyst aspirated, and it turned out to be a massive malignant tumor. It felt fluid-filled because it had invaded a blood vessel and bled under the skin. I had to have him euthanized. He chirped like a little bird and nibbled on my fingernail while he went to sleep. I'm just ridiculously sad about it, and can't seem to stop being teary. He was a wonderful little piggie. Bye, Lester.