"Several studies have shown that some ingredients are more likely to cause food allergies than others.  
In order of the most common offenders in dogs are  beef, dairy products, chicken, wheat, chicken eggs, corn, and soy."¹

Tuna Temptations - VERY HEALTHFUL Wheat free Salmon Temptations - VERY HEALTHFUL Wheat free Homemade Beef Jerky Peanut Butter Oaties - 1/2 lb Wheat free Peanut Butter Oaties - 1 lb Wheat free Tuna Treats - 8 oz tub Wheat free

¹Dr. Foster & Smith's source for expert pet information
http://www.peteducation.com/article.cfm?cls=2&cat=1664&articleid=143