It seems like Teddy and your guinea pigs sure like each other! (Well, the nip on the nose was just to make sure that it wasn't some sort of black, wet carrot! )

Snowy and my RB guinea pig, Taffy, always got along great. Sometimes when Taffy would be outside in his pen Snowy would just lay next to him and fall asleep. Still, be careful and always watch them. Even if Teddy is just trying to play with one of the pigs, something could happen and he could accidently hurt them.