No, I wouldn't leave a 10 week old pup outside. He just is too young. I would worry that he would get hurt or something. I mean you never know if another dog could get loose and come and "visit" if ya know what I mean. It's just too risky.

I think that you should probably keep him in the crate during the day. How long are you gone for? If it's a long time you might have to come home to let him out to go potty.

Hope this helps,

Diana