
My only advice is, start immediately. Let her hear the noise for a minute or so every day. Hold her at one side and the blaster nozzle on the other side, let the air ruffle her for a second or two, she may well protest at first, but you must stick at it.
I do this kind of thing when my puppies have to get accustomed to the clippers. Of course they are not keen to begin with, but they have to get used to it, and they do.
Dawn R.