I know there are many different schools of thought on this subject - so I'll just let you know what I do...
- I feed in the enclosure. Not only that, but I have a strict routine that I follow when it comes to feeding time. There are several things I keep consistent when feeding. First off, I only offer prey through special feeding doors that I've installed on the enclosures (custom mod's). I've had tremendous success with this - that is, it prevents my snakes from associating food with the main doors on the enclosures.
- Another thing I do is control the lighting in the room. I know this sounds silly, and I'll probably get bashed for this, but I have a single light in the room which illuminates the room very differently from the lights I usually use. I believe that this serves as just another visual clue to them that it's feeding time when that particular light is on, and not when the other are on. I know - snakes don't develop strong Pavlonian responses, but I like the idea of using every little bit that might help.
- The only other thing I'm sure to be consistent about is not touching thier food. I wear latex gloves while handling the prey animals (during freeze/thawing, etc.). To that end I'm just trying to keep my scent and the scent of 'food' as separate and unassociated as possible.
Generally, I feed on a 7 day cycle. My burm is about eight feet now, and eating and growing at a very healthy pace. He is now as tame as I've ever seen a snake. Although I'm always sure to be aware of his potential, I have little to no concerns about his disposition. Whenever I go to take him out for a walk, or 'slither' rather, I'm very confident and comfortable in handling him.
If you can get your burm into a routine in which he/she can develop a clear association with feeding that does not involve you, I'm sure you'll find that your new burm is a great snake to have.
Sorry for being so long,
- Mark