Why do dogs not get colds? Or do they get their own versions of colds?

Question: Why do dogs not get colds? Or do they get their own versions of colds?
- Keywords:
  cold,
  dog,
  illness
Asked by kiwigummibear to Charlotte, Jo, Kevin, Louise, Valeria on 18 Jun 2012.
- Joanna Cruden answered on 18 Jun 2012:
  
  Dogs do catch colds, Kennel cough is a dog cold, but they do not catch human colds, some viruses and bacteria’s only attack certain species, but some species can catch the same diseases as others. For example a ferret can catch human influenza and we can pass it on to ferrets

Question: Why do dogs not get colds? Or do they get their own versions of colds?