Dog Eye Infection Contagious. To be on the safe side, if your dog shows signs of an eye infection, assume it’s contagious and keep. Some dogs may have simultaneous eye infections with discharge but the cherry eye in itself does not spread.

If a case of dog pink eye is caused by a rare bacterial infection or a virus, however, the aspca warns that the condition can be transmitted by your dog to other dogs. Viral pink eye is contagious for between 7 and 14 days, while bacterial pink eye is contagious for 10 days on average. If you suspect your dog might have pink eye, it's a good idea to keep your pup separated from other dogs and to wash your hands thoroughly with soap.