Herd of Draltha

[Bertrom]

Hello,
I have just caught a "herd" of Draltha. They are in cages but I am wondering what to do with them? Breed? Sell? Kill? I tried putting them in a pen/pasture but they paid no attention to its borders and ran out of the room. How do I keep them in a specific area?
Thanks

[Fel]

They are not trainable for hunting or war but they can be decent once tamed for several reasons.

The reason why they ran out is because you caught them but that's it, so they are still wild animals and you will need to use an animal trainer to tame them.
Taming is a rather lengthy and somewhat complex process, so the wiki is the best place for the information.
https://dwarffortresswiki.org/index.php/Animal_trainer#Domesticating_wild_animals
They are grazers, so they will need a decently large pasture with grass or moss to be kept alive and fed.

You can also just opt to kill and butcher them if you don't want to tame them.
Being large animals, they give quite a bit of meat and bones (plus one skin for leather), and they have a value multiplier of 3 for these products, meaning that meals, leather and bone crafts.

They take 5 years to grow into adults so they are not animals you can butcher that frequently but the value multiplier and large amount of products per creature makes it a decent source anyway.

https://dwarffortresswiki.org/index.php/Draltha