Three dogs are at the vet in the waiting room.
When the first dog asks the second dog what he's in for, he answers, "My master bought a brand new carpet the other day, and at the first opportunity I soiled it, so now I've been brought here to be put to sleep. So what are you here for?"
The first dog replies grimly, "I'm also being put to sleep. My master had a table with a collection of expensive vases and while I was chasing my tail I accidently bumped into the table and broke them all."
The two dogs then look over and ask the third dog what he's in for. The third dog answers, "The reason I'm here is the other day my master stepped out of the shower and she bent over. I couldn't resist, so I jumped her from behind and took her like a wild animal!"
"So I guess you're also here to be put to sleep?" says the first dog.
The third dog answers, "Nope, I'm here to get my nails clipped!"