How warm is the hot side of the bloods enclosure if its to low and the humidity is to low then the meals aren't being digested properly and as many have said i believe they are urates but i think if the snake dosn't pass them soon i would consult a vet as urates have been know to get sharp edges while rubbing on the snakes bowels and can cause damage when giving the bathes make sure they are warm and massage her lightly that sometimes help for stuck urates to pass good luck and i hope all ends well