I'm currently experiencing the same issue with my Bredls python. He had been eating rats, mice and chicks just fine but has refused rats his last 3 meals. He has eaten the last 2 jumbo mice that my kings have rejected on their winter fast. I've decided to try scenting but if that doesn't work it's tough love for me. I refuse to feed an adult carpet 5-6 jumbo mice when 1 large rat will do.