Training my shitzu

Question
I recently moved and took my parents shitzu with me. He is potty trained and will be 4 in October, however since the move he is having problems with going the bathroom in the house (only when I leave and don't put him in the crate) which wasn't a problem at my parents house.  I know he is still trying to get used to my schedule, but not sure how to handle him in the process.  If I leave him out and I come home and he has used the bathroom somewhere I show it to him and tell him loudly BAD DOG, take him out and then put him in hte crate for awhile.  

I'm not sure if putting him in the crate while I 'm gone is good, but it is the only way to keep him from going in the house.  I just want to get him back to how it was at my parents and he never went in the house when they left.  Any suggestions on how to handle this problem?

Krystal

Answer
It seems you already have the solution, crate him.  The dog may be
happier in its den than loose in the house.  It relaxes, it feels safe in its
den.  It rests, the body slows down reducing the need for water and relieving
its self.  Dogs that have been crated all along do very well.  Leave it some toys.  Perhaps a Kong filled with peanut butter.  Don't leave
anything in the crate the dog might chew up.  It will do fine without even any
bedding.  You will come home to a safe dog and a house you can enjoy.

It would be better if he got a mid day break.  If you can't make it back over lunch, see if you can find a neighbor or professional dog walker.  Doggy day care is an excellent solution.