I have a 12 year old Chihuahua with very bad teeth, by bad, I mean the back of her teeth are caked in plaque and her gums are red and her breath is very bad. She is starting to get health problems because of it and using antibiotics only helped for a few weeks till the infection came back. Surgery will be hundreds of dollars and with her age and health; she might not even survive it. So I had two choices, find something to clean her teeth or have euthanasia done on her.I looked around for something I can use on her and found this product and after looking at this and a lot of other products, it was actually the cheapest stuff that worked, there was a lot more expensive stuff that worked and a lot of cheep stuff that either didn’t work or harmed dogs. (Never buy anything with grape or grape seeds, its poisonous to dogs! There were some products for dog teeth with grape seed in it, it should be pulled from the market!!!) With that said, this product was very safe and it didn’t have a taste to it, yes, I tasted it before I gave it to my girl. She hates the spray in her mouth so I tried the syringe thing, but putting that in her mouth hurt her so I just stuck with the spray, though she hates it, it does her no harm.There was a great improvement to her teeth, though not for her breath yet. I am seeing more white and less grown plaque. I have been using it for about a month now, and I am still using it. I love this product but I am not sure I can afford to buy it again, but I will if I get the extra cash for it.The down fall of this product, besides the price, is that you can’t let your dog eat or drink for half an hour before you use this and half an hour after you use this. No food or water! I understand this but all my dogs are free-fed and fresh water is put out daily and is always there, when I took both food and water away, no one was happy with me (0h, I have 16 dogs that are rescues.) Besides the no food or water and the price, it is a great product and I recommend it to everybody who uses it.