From my experiance with ASF's I have had no problems. But I will vouch for the fact that once they get an ASF they will refuse rats. I have 3 BP's that were rat feeders that will not touch em now after ASF's. My mistake was trying to get rid of a little overflow of ASFs and giving them to those snakes.

As far as aggression, I have never seen any aggression towards the snakes and so far none towards me. I will usually use a glove on them tho just in case. But like the others have said once you put them with the snake they almost except what is gonna come next.

Good luck with them. I just started a breeding group of 1.2 and will probably start a few more when I see how this first one works out.