Advice.

[SSSSnakes]

1- If the snakes shows no interest in the rat with in 30 minutes, take it out.
2- Stop trying to feed the snake every day, it will stress him out. If he does not eat the rat, then wait again for his next regular feeding day to try.
3- The rat appears to me to be a little big, but he should be able to eat it with no problem if he is hungry.
4- Check and make sure your temps are right and the snake isn't refusing to eat because it is to cold.