So my ball python has gone off feed since December 5th, where she took one of her usual mice but didn't eat the second one offered. She was rougly 480 grams at that point, and is now down to about 420 grams.

Is this a big weight lose that requires a vet trip? How long until I should try live? I don't want to switch to live if I don't have to, since she was eating extremely well before her hunger strike.