What have you found is the best way to stop barking? Lately Pann has developed an awefull habit of barking at people and dogs and things blowing in the wind

...you name it and he just can not act like this. He is almost two and has never had a problem before, I think it might have something to do with a bad dog sitter

a friend I thought I could trust with him but turned out not so much. So does any one have any advice that might be able to help me with this? I just want my well behaved little boy back and him not to be so afraid/vicious towards everything and everyone

people are starting to be afraid of him because he seems so bad