Yes...
If you get some HIGH QUALITY GRASS FEED ground beef, you can give it to them RAW. At least once a week in the winter I give it to my birds.
DISCLAIMERS:
1. Do NOT FEED regular supermarket ground beef raw. (Don't feed it cooked for that matter.) CAFO raised beef is not safe in any form.
2. Give them small, bug-sized pieces. They will usually snarf it down in a frenzy.
3. DO NOT LEAVE RAW MEAT IN THE PEN OR ANYWHERE. Feed it to them while you are there, piece by piece. Pick up anything that may have fallen to the ground. Never leave a "hunk" of meat out. Raw meat is a food that should be given "piece by piece" and never left out.
My birds love it and it's good (and easy) for when they can't get out and get bugs in the real world. It definitely doesn't have the full nutritional profile of "whole bugs" (which tend to be high in calcium and other wonderful nutrients), but it is a good "animal protein" which they need to be healthy.
I'm curious about the grass fed beef requirement, is that personal preference or will grain supplemented beef harm the birds. I've fed regular supermarket beef in the past and haven't noticed any ill effects, but it isn't a regular treat either. Thanks!