My 4.5 month old beagle (15lbs) had a bit of an accident last night. We were running in the park, and went opposite ways around a tree. She got wrapped up pretty bad. Last night, through today she has had a cough, and some gagging. It seems especially bad when she pulls on her leash. At the time of the accident she seemed fine. I am beginning to worry about her, and would like to know if anyone has had a similar experience.