Hi Everyone..I am hoping someone can help me!!
Buster will be 6 months on the 20th and he ws doing sooo well with the potty training, going on the paper and when its warm enough for us to go outside, does really good outside...and now..for the past couple weeks, he has been just going where ever he wants when he wants. WHen we wake up in the morning and when I come home for lunch and breaks, he does good on the paper but when he is out and about when we are home he is a little pee pee machine !!! I dont know what to do

I reward him when he goes on the paper and outside and when he does go where he isnt suppose to, I tell him Im mad at him and "no pee pee on the rug" in a stern voice and I ignore him for 10 minutes. He knows he is not suppose to do it bc he runs under the couch and hides..
I just dont know what else to do. We are enrolling in petsmart obedience school this week but they dont do anything with potty trainig in that class... PLEASE HELP!!!!!