This is more of a curiosity than an actual idea for my snake -

So for some turtles and lizards we have always added a calcium w/ D3 supplement to their food / insects. For birds that are getting frozen/thawed fish they get either a vitamin B or multi-vitamin supplement since thawing them in warm water depletes the vitamin content. Since snakes are getting whole prey, I wouldn't think it is necessary...

but is there any research out there that would suggest that feeding snakes f/t prey leaves them lacking in some kind of vitamin? Does anyone use some kind of reptile vitamin and does it seem to have any positive effect?