My dog has green snot and is sneezing. Is it a respiratory infection?

Poor Roxy! I can definitely see the dry discharge from both nostrils. You’re right in saying that this can be caused by an upper respiratory infection. In most cases these infections cannot be transmitted to people or from people to dogs. These are very common in dogs, and can easily be treated with antibiotics prescribed by a veterinarian. Unfortunately, nasal discharge can be caused by several other diseases such as a nasal foreign body or mass, or even pneumonia. Your vet can do some blood work and x-rays to determine the exact cause of Roxy’s nasal discharge. You should have her seen immediately if she begins acting lethargic, loses her appetite, or you believe she’s having trouble breathing.