Well heres my first post...LOL...but anyway, DreanandScheme I have never owned any of the smaller wolves but have read up here they usually dont tolerate their own kind. Of course each fish is different and there will be exceptions, but im guessing a birchir of equal size would be fine, as far as the exos a few of them might end up as LUNCH...but I hope this helps, im sure someone more knowledgeable should be able to help...
Sevendreamz