My red dog wore one for a bit Fell,he was a c**t for his high pitched yelp,a couple of days with the collar sorted it.Dont worry about the B+F,the shock collar emits a warning alarm when the dog barks,then if it barks again within 30secs or so it gets a shock,the dog soon learns that the alarm means trouble,thats how the dummy collars work,they have alarm but no shock.Usually once the habit of barking has been broken there's no need for a collar at all.