B. procyonis being a parasite it derives its nutrients from the definitive host which in this case would be a raccoon.  B. procyonis bears a small number of teeth which it uses to latch onto the lining of the tissue to keep it in place and so that it can feed.  Another useful component that it has is a stylet which can be used to puncture the tissue to give it another way of feeding.  Being that B. procyonis lives within a raccoon it might again be beneficial to look at what the nutrition of the raccoon is.

The raccoons diet consists of manly fruits and berries, nuts, small mammals, and some times birds or fish.  during the summer months the raccoon will eat manly fruits and berries and then switch over to nuts during the late summer and autumn period to help build up its fur before winter.  Raccoons only on occasion will eat smaller mammals, fish or birds because they tend to like food that is easier to get