Hello Paws family! This is a new product for us and we are recommending it for all our puppies current and past! New puppy owners will be receiving more information in your puppy pack and current puppy owners are more than welcome to contact us with inquiries! We are reccomending this for all stages of life! Any help in keeping our babies healthy and happy is something we want!  We will be starting your new baby on this before they leave, but we recommend to order prior to taking your baby home so there is no gap time.  If you have questions feel free to ask and if I can't answer your questions I will find the answers!