I have been giving my cat the NuVet Labs supplement for about six months now and I must say their product is just awesome. The people who handle the phone calls are all knowledgeable, helpful and professional. But I was actually recommended this product by my daughter. My cat, who is sixteen and very arthritic, wouldn't have anything to do with any of the supplements I was giving him. So my daughter told me that she had been very successful with this supplement with her own animals and I began my cat on them. It has made a tremendous difference in his health. He is moving easier and climbing which he wasn't able to do before. He used to be very cranky because he was in constant pain. Now he's just so happy, he's a much nicer cat! I'm very happy with this product. I work in a pet store and I recommend it to everybody!