Well, the pics are a bit blurry, my initial thoughts from the small picture was that youu've got one of three things: an butterfly larva, a bettle larva (grub) or a sawfly larva. The bigger picture makes it easier to see the prolegs (there are 5 sets of little stumpy legs on the abdomen), which is making me agree with DoubleRR's assessment that it's a caterpillar. But I'm going to say that it's a butterfly, not a moth, mainly because moth caterpillars are typically pretty furry. Cool! (And definitely not coming from your dog's pee!
Solomon - black DSH - king of kitchen raids (11)
Gracie - Mutterooski X - scary smart (9)
Jaida - GSD - tripod trainwreck and gentle soul (4)
Heidi - mugsly Boston Terrier X - she is in BIG trouble!!! (3)
Audrey - torbie - sweet as pie (11 months)
Patrick - blue - a little turd (but we like him anyways) (6 months)
Boo, our Matriarch (August 1 1992 - March 29 2011)