How do I stop my husky from peeing and defecating inside while I'm gone?

Crate train in smaller increments 15 min, then 30 min, then an hour, etc; gradually increase the amount of time in the crate. Give him a special treat that he only gets when he goes in his crate. Try and make it one that he loves that lasts longer, like a rawhide or a dental bone. I would recommend crating your other dog in the room with him to reduce the separation anxiety. Make sure you get a crate that has two latches for extra security; don't get plastic. If this doesn't work (i.e. the dog hurts himself when crated) consult a professional. Hope this helps!