Greenies Smart-Treats Regular Size www.petco.com - $1.99 Product Description: These delicious bone-hard treats clean your dog's breath while they clean his teeth. Greenies with natural chlorophyll help reduce odors, control dental tartar and plaque, strengthen gums, and diminish oral bacteria. RattyRat's Review: Rats love greenies, however greenies are packed full of protein, so you don't want to give them too many too often. The reason we gave Greenies only 4 paws as compaired to the 5 paw edible Nylabone, is because the Nylabone only has a couple ingredients were as Greenies are full of various chemicals. Nichole's Review: Greenies (dog chews) are great for rats. They even made a new size, Teeny Greenies, which are more rat sized. My rats love them and one does not even last a day. They are kind of pricey, but well worth it.