My 4-month-old puppy has a runny nose and cough. Should I see a vet?

This is suspicious of kennel cough, which is an infection of the upper respiratory system.

Kennel cough is most suspicious if Lexie has been in contact with other dogs in the past month or so. If Lexie has not had contact with other dogs, then the cough is likely due to something else. They can develop a cough and runny nose with conditions like distemper, allergies, heart worm, heart disease and lung worm.

For this reason, it's best to have Lexie checked out by a veterinarian. They will be able to determine the cause of this and prescribe the appropriate treatment. It's definitely doesn't appear to be an emergency though, so you are safe to wait a day or two to see if it gets better (can happen with some viral diseases).

I hope that helps and Lexie gets better soon.