I was thinking after seeing tons of people waiting for an admin to move their animals, there could be a way to capture the animals via a command like /animal capture and you would get an egg. You would need certain things in your inventory though, like teleporting. You would need like 5 iron ingots, a web (for the "net") and then after you "capture" it, you get an egg to use! Also, you can have it be only passive mobs like sheep, pigs, chickens, etc... That is just my idea and I don't know if it would work, so please comment!