I've seen both corn snakes and king snakes that refuse rodents pound on lizards.
Last year I had a well established cal king lay a bad clutch and refuse to eat - until I offered her an anole, which she pounded on - and then started feeding on mice again.
I think sometimes a king just wants a lizard, maybe due to a nutritional deficiency or something - kind of like how we crave bananas if we need potassium.
I've never gotten scenting to work, probably an issue with my method - but with my admittedly limited experience with corns and kings, after a few lizard meals you don't need to scent - they take rodents without scenting.
It's amazing though - snakes that seem to have no interest whatsoever in feeding will pound a lizard without a second thought.
Someone else with a brooksi last month couldn't get it to eat, tried an anole, and it pounded the anole and ate.
If your snake doesn't eat soon, try an anole - it may surprise you.
-----
I decided my old sig was too big.