Bitter Apple Spray Petco. The frozen peanut butter will keep them busy for a longer period of time. Grannick's bitter apple (1) clear all filters.
Discussion starter · #1 · nov 23, 2004. The product is 100 percent safe for dog use, but care must be taken not to get the spray directly in your dog’s eyes as it will sting. When i went to petco they didn't have any grannick's bitter apple for cats, but the did for dogs.