Butler's problems...

[adamanteus]

I sometimes find that if you (pretend) to try to take the food off them, they grab on a bit harder. As they do if another snake tries to steal from them..... So just pull it away from them, see if they bite.

[anji1971]

I'd try James' suggestion as well.
It's gonna be a bit tricky because from what I've read, Butler's diets are exclusively worms and leeches in the wild. They're probably wondering what the heck you're trying to feed them!!!

[Loren]

I sometimes find that if you (pretend) to try to take the food off them, they grab on a bit harder. As they do if another snake tries to steal from them..... So just pull it away from them, see if they bite.

Thats what I had to do with my couchii at first- it was like a kid with a toy- didnt want it until someone else tried to take it away. I very gently tugged on it, and he would keep swallowing, just so I couldnt have it.
I was also scenting them. Rinse them and scent them heavily at first, then stop rinsing, then just scent the front half of the pinky. It should start to accept the new taste as food.

[ssssnakeluvr]

my butler's back in the 80's ate fish with no problems. should take pinkies ok, try smaller one, will be a little easier to swallow.