many years ago i had one that wouldn't eat any item she hadn't 'drowned' first. didn't matter where in the tub you fed her, she always dragged it to the water bowl and held it under before feeding. Now that i think about it i can't ever recall that snake ever constricting. I wonder if she never learned, or had some defect she couldn't constrict properly and decided to drown instead ? she wasn't very bright though, she never figured that f/t doesn't need drowning.