Here is a passive tame trap for all the aggressive passive tames like this. ( can be made out of any material you want but stone or metal preferred.) place a pillar in the space needed and put a ceiling over it. Place a second ceiling next to the first one. Block off the ceiling with either walls or doorframes. Then if you have an argy drop the animal in. If not make a ramp up to the trap to trap it. Then just feed it through the floor and voila.

Hope this was helpful

-nerva