As a new pet owner, it can be hard to know when to make your first visit. If your dog is a puppy and has just been adopted, or if he's older than three months, then you should probably call ahead and schedule an appointment at that time. If he gets sick while still young, it may take some time before his symptoms are severe enough for him to need a professional veterinary doctor. However, if there's been an injury sustained during playtime with another animal (or human), this could mean that things have progressed further than expected. In both cases above: Your vet doctor for pets would probably recommend seeing them as soon as possible—but not necessarily right away!