While I was still breeding ASFs I moved them into a rack system with kitty litter pans. As soon as I did that I had ZERO aggression.
When they were in a tank system they were vampires and would routinely latch on and not let go, and yes, jumping up to get a grip on my hands/arm.
I think it had something to do with them being burrow dwellers? And being approached from above (hawks, etc.).
But move them into a breeding rack, I am sure they will calm out for you. I was seriously shocked, because they were so aggressive prior.
I handled all mine with bare hands and in a year never took so much as a nibble, could touch the babes, sort them, you name it. Same with jumping out, they never even tried to jump out of the racks when the tubs were open.
Bruce
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