The scorched and tattered remains of a rather large plush bear. The kind you win at the carnival.
While it had been the loving companion to a child at one time, or the romantic gesture of a keen Ring Toss playing suitor, these days it was left to slowly freeze. It sits with arms open waiting for a hug, and should probably be wearing a leash. you don't want it to run away.
"Mr. Snippy...hug ze beah.... It vill make you varm and fuzzeh. HUG ZEE BEAH!!!"
Cancer would make a nice pet... But really- you'd have to house train him! Give him a name, or at least get him to remember cancer... To me, it seems like a lot of trouble for a pet... and who knows how loyal the beast will be in the end? Here's a suggestion- Put a collar on Snippy! He's loyal, sweet, good-hearted, picks up when you call him, is toilet trained... Will never leave you.... Ect. See? It works PERFECTLY!
cake monster. It's mouth would be made up of a straw. The only reason why Snippy hasn't tried to get rid of it (or take it's straw mouth for his own) is because it spits out radioactive bullet for him, so he doesn't have to go looking for them anymore.