So, ok. I feel your plight. First off, if your snakes will take F/T food, switch them over. It's more time consuming, but a heck of a lot safer.

That being said, some snakes WILL NOT take F/T food and I don't condone assist-feeding snakes that are taking another prey source readily. So this is how I do things.

I put my live feeders in with the snakes and stay in the room the whole time. If the prey item is able to do more than crawl around (larger than pup size for rats or hoppers for mice) I don't leave them in with the snake for more than 5 minutes. If the snake doesn't take it, so be it. We'll try again in a few days. If it does, (you'll hear the bang of the strike) I open the tub quickly and check the position of the feeder's head. If it's safe, no worries, and I'll shut the drawer and leave it alone. If the feeder is in position to take hold and fight back, I will hold the head at bay with my feeding tongs until the rat either dies or is no longer in a position to bite. If you can take it emotionally, it's certainly helped save our snakes from a few nasty bites in the past.

Also, if you're snakes get bit, treat the wound with neosporin and just keep an eye on it. Keep the cage extra clean during the mending process. Keep in mind that snakes heal differently than we do, so the cut won't heal in a few days. Minor injuries are usually gone in a shed or two.

My albino female is NOTORIOUS for getting mixed up with live mice. We're just as careful as we can be and take care not to leave them together for very long.