I need to rehome my dog.

I have a 4 year old MALE, what we think is a mix between a Boxer and American Bulldog. He is neutered. He was a rescue and is quite skiddish, it took him a long time to get brave enough to walk on our laminate floor and not be jumpy at our water dish. We believe he had a rough start to life and will need the most patient, relaxed, loving home to go to next. He loves to talk back to you. He loves playing with toys and loves his treats. BUT, he does have an allergy to Gluten and will break out. We feed him Wholehearted Gluten Free food and he does awesome on it. He will need time and patience but will return it tenfold.