A couple of times SG-1 members might give off-worlders a pet. Jack gave Cassie a dog, Sam gave this dude a Cat (I forget his name). Considering how different the Avatar animals are from our animals, that could be interesting. I think they have cats in Avatar-land, but what about dogs?

That's all I can think of for now.

I do love the idea of thinking of situations for Toph and Zuko in SG-1. :3