You can feed your snake in a separate enclosure if you want but it would be best to feed him in the enclosure that you keep him in. It is a myth that feeding in the enclosure will make your snake aggressive. I personally feed my snake in his home enclosure and I don't notice any aggression. Actually to be quite honest my snake is ready to feed as soon as I take top off of his enclosure on feeding day so I do not move him. I believe that if I moved him he probably would strike at me, lol. It boils down to whatever works for you and your snake.