My male came home from the shelter with kennel cough and 3 of my 4 dogs ended up with it. They all were on antibiotics. By the time the second one got it I expected it and took them immediately to the vet, it was caught very early. If I were you I would take the dog in, because it can lead to other things pretty quick. Some dogs can get over it but I didn't take the chance.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD