I would want to know the worms burden and how advanced the disease is before deciding which way to go, and that can be done through x rays and echo on top of looking at the symptoms. Were you explained that part? What are the symptoms so far?
chuey_316 wrote:My reason at 1st was that the vet told me not to give him any preventative because giving it to a dog with heart worms will send them into shock and kill them.
So can do Immiticide, which kills adult worms on a larger scale and pulmonary thromboembolism is always a risk when treatings, higher when the worms burden is heavy and a dog is kept active. Many vets give an ivermectin-based preventive to dogs that are infected , since it kills developing larvae and microfilaria so that farther infection are prevented and then leave the dog on it till the worms are gone. The slow kill is more gentle technically, but not without possible complication either, since it takes longer for the worms to be killed and the dyeing worms can still do damage. If an owner does not want to go the Immiticide route, for one reason or the other, that is what is usually done.
I think that it would be a better option than leaving your dog without treatment at all, while waiting for the Immiticide, since you don't know when it will come. One of my rescue dogs was HW positive and I chose to put him on Doxycycline for almost two months , preventative (dog was already on it but threw negatives) and one single dose of Immiticide, after looking at his x rays and echo. His latest HW tests are negative.
I assume that your dog was not on any preventative and if so, why?