As per the new update adding ducks. We now have a lot of small animals that could be put in cages.
My thoughts on this would be like a moving crate/cage to transport small animals in that can carry a small amount of water and food so they don't die. I go far from my base to do trades and I don't have a lot of cha to teleport around being able to transport animals in a cage and not have to worry about them dying in route would be great