Woah, are you saying there was a .... ''overweight'' FA and a Dog in 3A on the same flight?

But I agree this is going to go sideways in

3
2
1
...


To answer the OP, I would assume that as long as he can do his job as required, and passed the necessary saftey courses, that the union would defend him until such time that he could not complete his duties or failed required saftey training.