"I have a question about this. My boyfriend is severely allergic to dogs. What happens if they seat a dog next or near to him--who has to move?"
A few weeks ago this happened on a 100% full flight I was on. The woman was alergic to a cat that was next to her. As she had a middle seat in the second to last row of coach, no one wanted to switch seats (she wanted to move far away). She eventually just got off the plane. BTW the same bozo's who would not swicth seats with her also were the ones who complained when it took 25 minutes to get her bags off the plane.