Burms can go off feed just like balls, just skip a feeding and try again(going along that everything alse is goood, humidity I feel burms are more forgiving) maybe get with burm owners in your area, altitude could be a factor in this case (I'm in SoCal). If my burms did not take a pre-killed from the tongs, I would just leave it in the tank on the warm side and usually it would be gone within the hour. Most are garbage disposals, but there are always exceptions to the norm.