yes but remember to keep grit around so they don't have issues.
one thing to watch out for if you use it quite a bit, is that cat food can be high in salt and birds don't do well if they have too much salt, I would just make sure that it is spread out and that they are getting plenty of their...
if you give them oats you need to give them grit, they need grit in their crop in order to digest the tough stuff like oats, but they are very nutritious.