What age does my dog need to be in order to use Miracle Vet? Matthew Kinneman January 02, 2018 03:09 Updated Follow Miracle Vet is safe for all breeds of dogs ages 4 weeks and older. It's also safe for cats ages 4 weeks and older. Related articles How much weight will my dog gain when using Miracle Vet? How do I use Miracle Vet? Is Miracle Vet safe? What are the ingredients in Miracle Vet? Why choose Bully Max dog food? Comments 0 comments Please sign in to leave a comment.