When do you start to panic about your BP not eating?

[Zincubus]

No signs of any illness at all and he recently had a fecal float done. I did notice something tonight while I was feeding him. I normally defrost his rats in bags that are put into water. I ran out of the bags I normally use and I started using crappy ones that leak a lot of water into the bag. I wonder if that has helped clean the rat and make it smell less. They normally smell pretty funky. He definitely looks interested but never actually strikes.

That sounds possible - You read about people scenting rodents before offering and 'braining' so smell clearly plays a part for sown snakes - that's why I never soak in water ..