Greenies Petite Size theratshop.com - $1.00 Product Description: Made for dogs, Greenies are a fun toothbrush shaped treat that are extremely popular with rats too. Safe and 100% edible with no added preservatives, no artificial colors and no added sugar, these chews will keep your rats occupied for hours. Each Greenie is individually wrapped. 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. 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.