Suddenly aggressive

[Bogertophis]

Use whatever works...it depends on the size of your cages. When I suggested using a paper plate or similar thing, you could use a shallow tray of some
kind, or even a new kitty-litter-box to just set in the cage for feeding. It's up to you. This way is much easier, besides being safer. There's no rush to remove
the "plate" either...wait until the next day if you want, or whenever the snake goes back in their hide to digest.

The one thing you don't want to use is paper or a towel (paper OR cloth) on the floor of the cage, as the dampness from the prey can make the paper or cloth
stick to the prey & get swallowed too, as their teeth catch on it. (& they cannot digest towels, that becomes emergency surgery)

One more suggestion: when you go to feed, your snake probably already knows food is on the way. Some are more apt to aggressively bite a hand reaching in
than others (even if you are just trying to put their "plate" in place). I have been known to use a ping-pong paddle in front of the doorway of the hide where the
snake is, just to keep them in there for a moment, & sometimes I even use it to back them up into the hide while I do something. A snake will also usually back
off with a short spritz of water in their face...it sounds so rude, but they do get rained on in the wild, & they do NOT associate it with you. So do what works, &
what you need do to, to avoid needless bites.

BTW, the idea of "feeding in a separate tub" comes up frequently on forums...it's a lousy idea that just keeps getting shared & believed, so don't feel bad.