Board Thread:General Discussion/@comment-4109966-20180523013046/@comment-29325824-20180523103224

You seem to be mistaken. Arrancar, like Shinigami & regular Hollows, do not possess a soul, they are a type of Soul.

As for your second question, yes they can. Yammy and Aaroniero, for one, have been seen doing it. However, as opposed to Hollows, Arrancar don't need to feed on Souls. They can survive on regular food just fine, like Shinigami.