Yep, fish are more nutritional than worms anyway. They're a step up from worms. When I cut up fish, I leave the rib bones within the meat to provide calcium and phosphorous. Just make sure there aren't any sharp edges sticking out too far. Then I just supplement with calcium powder a few times a month because it contains Vitamin D, which helps to metabolize the calcium.

As far as other meats, I've read that ground meat, like hamburger, isn't a good idea. It's probably just harder for them to manipulate. My personal preference is not to feed raw chicken (no disrespect intended, just a difference of opinion) because of the POSSIBILITY of spreading salmonella to the snake, and ultimately to myself. Best,
Rick