BP Refusing Food - I Need Feeding Help

[B.P.'s 4me]

I started my collection 3 years ago so the majority are between 2 - 3 years of age, with a recently acquired juvenile of about 5 mos., and a couple that were acquired as adults. MOST of mine eat f/t, with a couple that came to me eating live and have resisted making the change to f/t.
In my limited experience I have found that USUALLY youngsters eat better and more consistently than adults. There may be random circumstances, such as shipping, shedding, etc. that will put the young ones off for a bit, but for the most part, if temps, humidity and habitat requirements are met, they might go off for a couple weeks to a month, but then get themselves on track.
THIS year however, starting in late fall/early winter, almost all of my adults are off. Some have only had a couple meals since early November and even my most dependable eaters are skipping meals. Since my husbandry hasn't changed, I'm assuming it's hormonal , esp. as a few of them are JUST starting to be a bit more animated and show some of their old interest when I've got the hair dryer working on warming up f/t.
Very generally, I find that offering live will often prompt one that's off their food to strike/wrap, and feed. The downside of that though, is I would prefer NOT to transition those that previously took f/t to feed on live only. I no longer worry the same way I used to, I have reached the point in which, if the snake seems to be in good condition and refuses food when offered, I just wait 10 - 14 days and try again. I look for them to be "cruising" in their bins, as that's often a sign that they're hunting, so laying with their head out of their hide is an indicator that they might be at least THINKING about hunting.
It's been my experience that if they act like they're afraid of the prey they probably aren't going to take it. If they show NO interest, no tongue flicking at the prey etc., they probably aren't going to take it. If I'm not sure, I usually heat up one less than I think I need so am not discarding rats all the time.
Hang in there, if your conditions are right, and if your snake was eating well before, it's probably just taking a break. Easier said than done, but TRY not to worry, ball pythons can be frustrating in the feeding department, but will usually get around to eating whey THEY feel like it.