Let's see..
My dog Shai was named by my sister and I have no idea why
I used to have guinea pigs,
Squeaker: Because he squeaked alot ^_^;;
Brownie: She was Black and brown and I didn't want to name her Blackie
Princess: She was the runt of a litter, she wasn't very healthy, so I figured delicate like a princess
Oliver: Another runt who got picked on because he was small, the others bit his ears and he kept getting out of the cage, I'd find him on the floor outside the cage, squeaking

anywho, he was named after Oliver in the movie Oliver and Company
JP: Jenny's Pig
Prissy: Because I didn't like the name chrissy, I have a crazy cousin named chrissy
