These have always worked the best on my dogs. Previously 3 pomeranians but as of last year 2 Pomeranians and 1 Apple head long hair chihuahua. I'm counting the one that passed because she loved these! When I switched vets he thought she had dental work and I said no. He asked if I brushed her teeth and I told him about these. I don't think he believed me because that was when this brand was still a couple years old. They all love them but I do take it slow if not theyll get constipated . I'm giving this a 5 for the price, the easy way I can bend and twist to cut in half. Also, they no longer poop green! Again, I go easy. Maybe twice a week and in halves on the tiny size. I wouldn't buy any other kinds just because they're green and cheaper at times. This is the brand that I've tested for years and this is what works and what they like!