A use for Ostriches (was use for crabs)

So Ostriches are being added to minecraft, and I have a suggestion for them. You see the "trailer" for the ostrich had the ostrich stick its head in the sand. And I think that when an ostrich does that a sand block should be dropped, allowing for renewable sand farms. Perhaps they could be scared in to burrowing their head. Two reasons too add this are 1. It can be tedious to gather large amounts of sand, a sand farm would fix that. And secondly some players duplicate sand using bugs or exploits, this would give them an alternative to sand duping.