I feel like the worst mom in the world Bentley has been barking outside ALOT! so i borrowed a bark collar I put it on him and sure enough he barked out side and a warning came then barked again and a shock came! he freaked out and screamed at the top of his lungs I tried to catch him but he kept running and crying and the collar keep shocking him I finally caught hime and took it off straight away (crying myself all this time) and hugged him and mommy sorry! tonight he is freaked out at everything! and sticks by me like glue I hope it didn't traumatize him :( turns out the collar is for bigger dogs not little ones I could have died!