My 4 month old Chihuahua is always going to the bathroom in the house. We tried giving him treats but then he would jut pretend to go to the bathroom to get the treats. I try to take him out every 2 hours, but when I bring him back in, he goes. He holds it in through the night, and i have him trained to go first thing in the morning, but for the rest of the day he isn't trained. Can somebody please help me!!!!