Pet Free Roam

I see someone has already posted something similar but I have fleshed this out a little more.

What if you could build little pet homes that can "tether" a pet. for instance you could build a dog house for the dogs or a cat scratch post for cats and birds could have a cage. you can change collar colors on cats and dogs but you could add little tags on the birds leg that also change color. then on each house when a pet is tethered to it the home adds a icon or pixel that is the same color as the collar. so when the pets are "attached" to the home they can only travel a set amount of blocks while not teleporting behind you forever. you could still sit them down where they are but when they stand they don't follow the player. and whenever you "detach" them from the home they act as they do normally and follow the player on their journey.