Absolutely not. Which means our health guarantee also is not dependent on you keeping your dogs on supplements. We recommended you consult with your veterinarian about any and all supplements and if they are right for your pup. When we wean our puppies we also supplement with probiotics as well as Nuvet Plus. We believe both of these products are vital for optimal development. To find out more about Nuvet Plus, please click here! But again you are free to pick and choose with your vet's help the right supplements for you!