Abby always wants us to get a guinea pig, should I or shouldn't I?

It's cuddly, it's cute, she can snuggle with it, but we already have 2 dogs.  Can't she just snuggle with them?  My niece has one, and of course Abby loves her.  I have to be honest though, when you hold them, they poop and I don't think I can handle that.  Sorry about that, but that's what I always think of when it comes to guinea pigs.

This is pretty cool..helpful hints from Petco about guinea pigs.  Some I knew some I didn't!

Should I or shouldn't I?  Do you have a guinea pig?