My middle baby has been chewing her feet for some time now. Doc feels it is an allergic reaction to grass. She rarely goes out anymore, we have to force her these days. I just performed a check on our treats and found the Blue Buffalo treats contain vegetable glycerin. The organic treats I have do not contain that ingredient. I trashed the BB treats, just in case that may be irritating her. I heaved switched food, given her Benadryl, purchased cream for her feet, nothing really giving her complete relief.