Bruce, my old post finding ability truly sucks this morning so no link, but I remember asking last year about erratic feeding/refusals in our breeders this time of year. I was assured this is perfectly normal behaviour as they are focused more on mating than hunting. As long as they are going into the breeding season in a great shape and are rested appropriately between introductions, I seem to get the impression that you just offer them food and if they want it, they'll take it.