I respect and like flight attendants, and do exactly what they say on flights. I would have declined this order. I would have removed myself from the flight, not picked a fight, to be clear.
After reading about this, and a teacher who fed a live puppy to a snapping turtle, I have to ask myself...WHAT THE HECK IS WRONG WITH SOME PEOPLE?
I don't know what the flight attendant was thinking, since the airline's policy was that the dog in a carrier should be under the seat in front of the owner. Pretty simple and clear policy, IMHO.
If it doesn't fit, and the flight attendant isn't budging...you get off the flight and go find a carrier that will.
This just makes me sad.