[dlu]

It seems that my 3 year old shar-pei has been acting more and more aggressive as she ages. It was the sweetest dog before and it seems that a switch just turned on which made her super protective about her surroundings to the point where she will bite me. It seems that sometimes she will just snap even when I'm just petting her and it has gotten to the point where I get paranoid because she is getting to be unpredictable. When she is sleeping, as well, at times she will start to growl when I get too close.

I have no clue what brought this on as I have never treated her negatively or spoiled her and feel that I have lost dominance. I also don't know what to do at this point beside seek professional help.

I was wondering if anybody had these sort of problems before and if anyone had any experience with a professional trainer that deals with aggressive dogs. I have used google to locate local trainers, but I would love some referrals from people that have had successful sessions with previous trainers.