Spray Deterrent for Dogs Chewing Furniture, Fur & Household Items Grannick's Bitter Apple Dog Chewing Deterrent is a taste-based spray deterrent for dogs chewing on furniture, fur, shoes, and other household items. Invented by a pharmacist in 1960, this non-toxic formula leaves a strong bitter flavor that discourages unwanted licking, biting, and chewing behaviors without harming your pet. Safe for use on skin, fur, and surfaces, Grannick's Bitter Apple Dog Chewing Deterrent can be sprayed directly on problem areas or objects. This spray deterrent for dogs chewing is gentle enough for repeated use and won’t stain fabrics or finishes—making it ideal for training and behavior correction at home. Discourage destructive habits with Grannick's Bitter Apple Dog Chewing Deterrent—safe, effective spray support for dogs who chew where they shouldn’t.