Might want to try not feeding in a separate container. Moving them is stressful, and poses a risk of conflict if there's already rodent smell about the room and they know it's getting close to feeding time.
I'm not sure if what you're describing was defensive or not. It could just be a crazy feeding response. I have a snake who strikes from inside her tub every time I walk past if she's wanting to feed.
Since he ate later in his tank, I'd say he's not too stressed out and there's not much to worry about at this point. Hopefully feeding will go more smoothly next week.![]()