"Cage Aggression" is mostly mistaken for a good feeding response.
My snakes are all comfortable, perfect husbandry, etc. Whenever they just ate, they are all curled up in their hides, and after a few days I can pick them up with no hissing, striking, etc. BUT if it's close to feeding day they are much more alert. Following my hand if I move it in front of them. In reality they're just hungryand they LOVE TO EAT. lol