Thanks, everyone
He's doing great - a wonderful addition to the family
I have a year old pit/Australian shepherd mix, and my partner has a 6 y/o Malamute and a year old German Shepherd/Husky mix.
Riggs is the smallest so far, but he sure has a lot of spunk, and he loves to play with the bigger puppies
I have slight concerns about how much he plays with Callahan, my pit/A.S. Mostly 'cause of not wanting him to have too much exercise before or after meals. I've been free feeding him so far, and he doesn't seem to eat too much at a time, but I still don't want his stomach to get upset when playing with Cal. They mostly just wrestle around under the table inside, gnawing at each other and whatnot, but I'm still not sure what's good and what's too much for them.
He's a very sweet little man though, and I'll definitely post more pictures soon