My male hasn't eaten in 5 weeks. He's always had a GREAT appetite but over the past few weeks, he's refused to eat. Nothing changed the first 2 weeks that he didn't eat, then the last 3 weeks he was relocated, but is still getting his daytime/nighttime cycles, two hides, cool/warm side, humidity, etc.
My female on the other hand, seems to have double the appetite. She's been eating perfectly. I have noticed that he has been losing a bit of weight. She's doing fantastic. They both have the same exact setup.
I heard adult BPs sometimes fast during late fall/early spring so I was thinking that this may be the issue. The female (Zelda) is about a year and he (Caesar) is about two years old.
Here's some photos:
Caesar is the one with the LOOONG stripe on his neck. Zelda is the other snake.
This is Caesar. You can notice he seems a bit skinny.
EDIT:
I'll also add that Caesar shed after the 2nd week of not eating. And he's been on the cool side of his enclosure more than Zelda.