I had this problem with my Chihuahua/Yorkie mixed. I moved her kennel by the back door. The backyard is where she uses the bathroom. I allowed her to stay in the yard for one hour per bathroom break. I monitored her intake. I noticed that after each meal she immediately used the bathroom- doing a number 1 and 2. I would never leave her food out because I wouldn’t be able to monitor her bathroom break. I fed her twice to 3xs a day with plenty of treats for using the bathroom outside. I treated her as soo as she walked back in the house- but that’s only if she actually used the bathroom. I hope this helps. House breaking a puppy can be frustrating.