Hi! So today when i got home, my Westie puppy (about 11 months old) excitedly came to greet me, as usual. But this time, after jumping and barking a little bit, he made a strange wheezing/coughing noise thing. It's kind of hard to explain, but it sounded like a wheezing noise coming from the back of his throat. I also noticed this the other day at night while i was in bed, so it has happened more than once. What could this be? Thanks!