Dog-whistle Blowing

I have been conscious recently, partly because of my super-power hearing, of an enormous number of dog-whistles being blown. In the interest of brevity I leave you to select your favourite examples. However, Buddhist Pizza Inc. our parent company, registered, as you know, in the canine islands is pleased to offer the following service.
Dog-whistle blowing.
Should you wish to blow a dog-whistle but be of a nervous disposition or in delicate employment, marital or financial circumstances BPdogblower.org is here to help. Payment of the usual fee to our finance director and accounts receivable wallah would be much appreciated.

Alternatively in these straitened times you may wish to do this yourself.

You do know how to blow a dog-whistle don't you?
You put the dog to your lips and blow!