My bee went off feed his first year breeding (started at 700g). He lost ~30g all winter, but didn't eat from November to March. I offered biweekly until he started eating again and he was fine. Three seasons later, he only misses a meal when he's in blue and still breeds like a beast! I think it's more that the females will eventually tell him "we're done here, bucko" and then he'll quit being so distracted - or he'll just get hungry again.