My male BP, though not anywhere near any other snakes, just got off a 3 and a half month "Hunger Strike". He's fine.
Are you sure he's getting thinner? Or are you just worried... It happens to the best of us.... I've never bred before so I don't know what the situation is in moving snakes around, but if you get a chance in the next 2 or 3 weeks weigh him and see if there is any weight loss. If its only been 2 weeks then I doubt there will be anything wrong with him now.