I have 2 Aussie litter mates, male and female. They will be 10 years old in August. The male has tested positive for heart worms. I have heard the treatment is very difficult on older dogs. We are not sure what to do although the local vet is wanting to do the treatment. Is he too old to withstand this treatment? They also suggested that my dogs be shaved and I know that this is not usually recommended for aussies with their all-weather coat.
Heart worm treatment is hard on any dog. I know the treatment used to be arsnic. I believe there is some new treatments, so I would talk to your vet about the treatment and then do some research online. It used to be that the dog had to be confined to a small crate the entire treatment. The dog can not get excited at all.
As far as the shaving, what is the exact reason? As a groomer, I have cut several aussies very short there entire lives, and their coats are fine. It really depends on the blade used. I also breed Aussies, so I know all about their coats. I used to cut my older girl short for the summer every year (she passed away a couple of years ago). Her coat never changed, and grew back well for the winter. Feel free to PM me if you have any questions.