When you kill a mob with silk touch, it should drop the mob’s spawn egg.

With this feature, you are able to put silk touch on weapons, like swords, bows, mace, etc. This would make spawn eggs available to players in survival, essentially allowing for players to collect mobs and take them wherever they want. This most likely would have to be nerfed so you can’t put the eggs in spawners in survival, otherwise it would be too overpowered.