I am not going to tell you I know what might be wrong, but I will tell you Gunner did the exact same thing for a day or two. Oddly enough, it was the day before his second series of shots. I spoke with the vet about it and she said if it continued to bring him back, but she thought he was just being a puppy and not wanting to stop what he was doing for fear he would miss out on the fun. It made sense at the time and he stopped the next day. At least I hope that normalizes your situation.
PS. I have a 2 yr. old who needs to be potty trained if you are offering! Ha! Ha!
Good Luck!
PS. I have a 2 yr. old who needs to be potty trained if you are offering! Ha! Ha!
Good Luck!