I fed live for the last 7 months, and the live rats we fed him (same size as the frozen) he would strike and coil, but too far back, which would cause the rat to bite Monty. So we switched to large mice, and we were feeding him 3, but once he ate one, he wouldn't strike at the second until the next day. So he would be already digesting the previous mouse by the time he got the second, and he got stuck in feed mode. I've also heard of snakes suffocating because they inhaled substrate that got stuck to their noses while striking. And it getting balled up in their throats and choking. So yes, it is a concern