Yes the bitter apple for dogs can be gotten at pet shops and pet catalogs or online. It is just made from the sour green apples, it is harmless to your pet. That is what it is made for. I have trained and worked with trainers and just a few times of tasting that on the toy will make the one dog want to leave that alone from now on. I have 2 chihuahua's house broken to a litter box, the bad part of that was that the one wanted to eat the doo doo's of the other. I put the bitter apple on and about 2 tries and that was enough for him. Trainers use it all the time and for years for many such purposes. I hope you see this and reply. Sorry I did not get back to you sooner.