Nice snakes. Still one of the favourites no matter how common.
Re feeding together - It happens very quickly. I just had an experience with my albino kaouthia. I only put them together for the breeding season, otherwise all snakes are housed seperately.
I fed them and in retrospect I should have taken one out. I gave each a thawed rat (they are about 1.6m each) on opposite sides of the cage. They bit it in usual style and waited.
I sat and watched with the hook stick, and as soon as the one snake moved to start eating the rat, the other shot across the cage and bit it on the head. I intervened with the hook stick and it released. Luckily no blood or harm done.
Caught them mating the other day so obviously all is forgotten
The point is I thought I could stop it before it would happen, but there was no way. Be careful.