For one month I believe it is a huge weight loss.Our female pastel wouldn't eat for six weeks and she lost no weight and even gained some.I would be calling the seller and tell him you want to trade out for the same type of snakes.Our pastel went back off feed and I have been in contact with the seller and he said he would fix it if the BP didn't start to feed soon. This is what a trustworthy seller would do.
Mike.