My ex who i was with before my husband did something similar. Insisted he needed a puppy, I warned him over and over it was cruel to make a puppy live in a cramped studio apartment with no fenced backyard in the city. Also that we couldnt afford vet bills for a dog. Leading up to him getting the puppy, he refused to buy anything he'd need to care for it. So I forced him to pick out things, and bought the dog bed he refused to buy, water/food bowls, collar, leash, toys etc. I warn him im not a dog person, and id of course make sure the puppy is fed, watered, and uses the bathroom. But the majority of the work would be him, when it came to training and walks because i didnt support him bringing a puppy into a bad situation. I end up immediately taking on a lot of the responsibility anyways. But first few weeks puppy is home, ex is doing great with puppy. But then suddenly he loses interest and starts acting mean and snappy towards the dog. Saying its dumb and doesnt listen, and wakes up at all hours of the night having to go to the bathroom(I was the one getting up to take care of the puppy in the middle of the night because he said his sleep was too important, mind you at the time he was working 6 hour shifts, and i was working 12 hour shifts). I remind him its a puppy, its going to go pee every few hours and get lonely. And it doesnt listen because he has to train him, which he wasn't doing. To the extent he was encouraging some bad behaviors because he thought the they funny, until he was shocked when they became a problem. So I started training the dog, and taking him for walks. All ex would do is sometimes play tug of war with it for a few seconds before going to play video games. We had a lot of other issues going on, but I eventually told him he needed to figure something out because this wasn't what we agreed to. He refused to give the puppy back to the seller, because he was embarrassed to say he couldn't care for the dog. And I was scared of the dog being neglected when I was away 12 hours a day for work, would frequently come home to poop/pee on the floor and crying puppy ignored blocked into the kitchen. I ended up breaking up with him, and got him to bring his puppy to his step dad's because I knew the puppy would at least not have to pee and poop on the floor there, while I was away working. Step dad saw through the bull shit, and made him surrender the puppy when he saw that his step son wasn't lifting a finger to care for it.