Anyone else's dog "huff" along with panting after exercise?  Max does this. It's usually after extended exercise, even a long walk. He is 9.5 months old. He's a big boy compared to Mika. He's 55lbs, but does not seem fat.  

Does not seem to be related to water/ lack of water etc, although both dogs seem to inhale their water and cough a bit afterwards.

Huffing (best word I can come up with) meaning a forced exhale along with panting.

Doesn't do it after he cools down, but it's a little disconcerting since neither Mika or Ginger have ever done it.

Thanks in advance.

mine do it a bit. Always just assumed it was an attempt at clearing accumulated saliva in their throat while they were panting hard if swallowing was working well enough.