We just got a new puppy last Friday and took him to the vet on Sunday, 7/5 to get his first round of vaccines ever. He is 19 weeks and the people we got him from were not taking care of him (obviously). So now, according to the vet, we have to keep him inside until he completes all 3 sets of booster vaccines which is another 10 weeks or so. We live in a 1 bedroom apartment and I can tell he is already getting frustrated not being able to go outside (the previous owners kept him outside with his siblings). I want to be able to train him properly and keep him active but also keep him safe. Any tips?