I bring home Sceolang but the kids refuse to take him in as a pet, what do I need to do?

I've tried everything, reloading, making the dog wait, going in and out of the cells...etc

Im in xbox with Heljhakin house and have two kids and no pets. This game is so bugged

The kids come with the pets to, at least they did for me, now I have an fox in the house.