Here's the method that I've used for my two gophers and numerous Texas Rats and it's been working great for me. On feeding day, thaw out the food, germex your hands and handle you Pit for 15-20 minutes. If he bites, hisses, rattles or strikes, IGNORE it. Do not give a reaction. If you get scared, then the bluffing worked and your snake will know that you'll leave him alone. Ignore the bluffs (and pain). After you've held the snake for 20 minutes, put him back in his enclosure and feed him. Soon, he'll learn that he gets handled and then fed. They'll still hiss, but I now have gophers that climb into my hand when I open the cage, because they know that once the handling is over, they get feast.
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1.0.0 Great Plains Ratsnake
1.0.0 Corn, Lavender Aztec het for Amel
0.1.0 Black Ratsnake
0.0.1 Texas Rat (tame)
1.0.0 Broad Banded Water Snake, Hypo
1.0.0 Black Bassador Retriever
2.1.0 Godchildren, 1 Evil, 2 possible hets