Congrats on your new baby. How long have you had your Zeus?
Since he went in his crate at the "puppy place," it seems to me that he just isn't familiar with any aspect of potty training. I agree with what others have said and recommend that you take him out every hour until he gets the hang of things. I think sticking to a consistent schedule is key. I use the signal phrase "go now" when my boy is doing his business...and now if we are out on a walk and he's dawdling, all I have to do is say "Go now!" and he relieves himself. It takes time for yorkies to potty train (stubborn little guys!
) but he will learn if you are consistent and understanding and praise him when he is a good boy!