BCI Randomy Agressive

[Zcorpshea]

I have kept a few boas and I have had a few that were pricks straight from the get go but this is different.

My Hypo hey Moonglow BCI Male will be 1yr in April and until about 2 weeks ago went from being a curious snake to aggressive.

Normally when I open his viv he comes straight to the door just pokes his head out and sniffs the air.

However two weeks ago, as normal he came to the door except he decided to bite me as I reached in. I went slow as always, and was on the complete opposite side of the viv.

Since he has taken to hissing and biting if I attempt to handle or get close to him.

Hes eating schedule has not changed, he eats every friday and the prey has remained constant, hes currently eating Weened Rats. The temps and humidity also haven't changed.

Any thoughts or advice as to how to approach this?