Update by user Sep 28, 2019 When I took her to the vet after one month of struggling to get her to eat and wondering what was going on with her energy level, she had indeed lost more than one pound of weight. Not good as she is only 12 pounds to start with. Happy though that nothing worse happened, I would just say be careful if your dog stops eating normally if you give this product to your pet, and be suspect of it being the problem. Original review posted by user Sep 28, 2019 Sorry to hear about your experience, mine was not as drastic. I could not get my dog to take the vitamin no matter how much peanut butter I put on the pill, or if I wrapped it in a slice of turkey. I started cutting it very small and adding it to her kibble and also added wet dog food. She would eat about half of what she normally eats. She had very little energy so I took her to the vet. Turns out she has other problems too, but I stopped the vitamin pill and she now eats normally, and then some. I don't know what is in the pill but have to trust the dogs instincts. Has anyone else had that happen? I did not complain to the company, or try to get refund, I really cant prove anything so I just stopped giving it to her.