Yes, just make sure the label says "live cultures added." All yogurt is made with the same beneficial bacterial cultures, but heat during commercial processing kills most of them. Only the kinds that have a "live culture" label have extra cultures added after processing.
You aren't slow, Southern28Chick, most people don't know there is a difference or that the "live culture" yogurt is better for them. You are wise to ask!
You can dilute the yogurt with water and force feed with a syringe tube or you can mix fresh greens in it, kind of like a dressing and let your birds help themselves. If they aren't used to it, they may not take to the "dressed" fresh green method, but might aquire the taste with time.
Keep us posted on wound healing!