[Judy M]

any vets I have been to will require a heartworm test before renewing the HW meds if you have a lapse in monthly treatment. , but if continually on the monthly med, they will renew it without the ktest (and additonal test charge), BUT the holistic vet I consulted recommended giving the HW every 45 days rather than once a month, to lessen the amount of toxiic med given. and she recommended natural methods for flea control and not spinosad (Comfortis) at all, cuz too toxic