Buttons could definitely have kennel cough. She could've contracted it before the vaccine, or shortly after. My sister just adopted a Border Collie x from the shelter in February, she had all of her shots utd, and she didn't seem to have kennel cough. But, right when she got home their English Bulldog (also vaccinated) started hacking, not eating (he lost almost 10 lbs), and the vet said he had kennel cough. The vet did give him medicine, but it took him a few weeks to fully get over it. Now they're both totally fine