Ants can be brutal. Some species of ants steal the eggs of different colonies to force them to work for their own colony. Sometimes, the kidnapped ants rebel and lay waste to the interior of the colony that kidnapped them if they think they can overpower them.
Bears should just enslave some other animals to produce milk for them. Simple.
Ants do that. I think they enslave aphids
Ants can be brutal. Some species of ants steal the eggs of different colonies to force them to work for their own colony. Sometimes, the kidnapped ants rebel and lay waste to the interior of the colony that kidnapped them if they think they can overpower them.
https://en.wikipedia.org/wiki/Slave-making_ant