did you get a health guarentee with the puppy? if so READ it . most will guarentee against genetic defects but very few will take responsibility for things like worms, lice fleas. etc. because these are common puppyhood ailments and can be picked up anywhere even though they most likely had the problems before you got the puppy.so you dont really have any recourse for any kind of monetary reimbursement unless you have something in writing from the breeder that they will cover those kinds of things. and more often than not they wont.