Won't Eat

I have had my snake for almost two months. For the first six weeks he ate perfectly, without me even having to put him in the dark. But then my original box of frozen pinkies ran out and I started to buy the mice in single packs, same brand different packaging, and now he wont eat! It had been almost two weeks and he hasn't eaten!
I have given him mice three times now. I have tried increasing the humidity of his tank, feeding him in the tank, keeping him and feeding him in the dark, but he just isnt interested. Tonight he was moving about the feeding box until he smelled the pinky, than he bolted! Like it was a horrid smell! I don't know what to do.
I know snakes can go a fair bit without eating but he is getting very lethargic! I will try wiggling it infront of him next!

To add onto this. He shed a few weeks ago but he ate a mouse already since then!

It is frustrating when a corn refuses to eat. I have had a few of them refuse to eat mice I bought from a different supplier. I boiled water in the microwave, took it out, and dropped the pinkie in it. I remove it after 5 minutes, let it cool down and put it in a small container with the corn. I covered the container with a cloth and checked back in 20 minutes and the corn ate. I assumed the pinkie smell was altered by the hot water, and more acceptable to the corn.

I haven't heard of putting them in the dark to feed, but it does make sense. I've only had mine a few weeks and the last time he fed was while high in the tank in a fake plant. So far so good. He get's fed tonight and was once again in his high spot this morning. He's either buried in aspen or perched in a plant.

Good luck and let us know what happens.

Many people say corns are nocturnal. I won't say they are fully nocturnal, but mine do seem more active as the snake room gets darker. I've found them in the wild in broad daylight, but find many more at dusk.

Is he active? It's about time to go blue again. You can try cutting small slits in the back of the pink before feeding.