On a recent TATL flight on Lufthansa I had the...ahem...pleasure of sitting next to a couple who brought their dog along in a carry on. 5 minutes after takeoff I was subjected to the first blast of dog gas, which, in addition to being especially rank, had an abnormally long hang time. After a short reprieve, said dog let loose again right in the middle of the meal service. Several more unpleasant events followed throughout the flight. What is the protocol in this situation? Should the dog have been expelled to the galley? Why are dogs allowed onboard in the first place?