I've gotten used to the occassional refusal. Last week I had 3 refusals out of 16 snakes. 2 were in blue, 1 is a breeding male that refuses every 2-3 weeks then eats again. I can tell all 3 of those are hungry this week but I have 2 others in blue now...lol. But I've had a week or two where I had 50% success rate. I have to say though, switching my 3 picky ones to ASFs has cut down refusals by quite a bit.