yes, it is necessary for sure and if you live in a warm climate like you do i would have mine on heartworm meds year round. Mine get Frontline Plus. its like a treat for them. its chewable and the love it
I was up in arms trying to decide which line to go with. I settled with Advantage Multi. In addition to the heartworm preventative, it also
prevents mites, intestinal parasites and fleas. We live in Florida so
I felt we needed the flea protection. I also liked this brand because
it has a 3-9 pound dose.
I also use Interceptor like Karen because of the weight issue, and I do not deal with fleas enough to treat for. If you have to consider fleas where you are you might want to look into the Advantage Multi.
I like the Interceptor too & have used it for years on different sized dogs. I chose to stay with this product over one that covers fleas since I only use flea/tick preventative when the climate dictates, if I had to dose for fleas too every month I might choose different.