Tell that to my neighbours who don't want to listen to my dog howl when we leave the house. Even when I was visiting my husband in hospital (and the weather was warm), I was told in no uncertain terms that I should be leaving my dog in the car and not alone in the house if he was going to make that much noise, otherwise, next time they'd call the police.
Hmm, would the police break into the house to shut a dog up cos I'm damn sure they'd break into my car on a hot day to release him.
(Not having much luck finding a reasonably priced anti bark spray collar but we've bought a nylon muzzle to try - fingers crossed)
It appears that you have little knowledge of dogs. This is a situation that you [as a dog owner] must change.
Barking problems don’t develop overnight. When your dog developed the habit originally, it was not dealt with. It has now developed into an accepted routine, a routine which he sees as being necessary to ensure your return. For him it is simple logic. The problem is made worse if you rebuke or punish him when you return and have to face the neighbour’s comments. Your dog would relate this unpleasant experience only with that which immediately preceded it, i.e. your absence. For him, a justification to bark.
The straightforward [and only] answer is normal humane training. If you really love your dog, you will be prepared to take the time and trouble necessary to learn what to do. Invest your money in
reputable literature about dogs and about training, and then train/treat your dog accordingly - it isn’t exactly rocket science! You could also ask advice from a reputable dog-trainer.
Forget the „anti-bark spray collar“. It should be considered only as the last resort; only after all other steps have proven unsuccessful. It is not a toy and can cause more problems than it solves if used unprofessionally.
The idea of using a muzzle to stop a dog barking is new to me and simply perverse.
To effectively stop a dog barking or howling, the muzzle would have to restrict jaw movement to such an extent that the poor creature could not eat, drink or pant. Within a short time the barking problem would be solved – permanently.