Doubtful. However, the QM2 has a grassy area where the attendant walks the dogs and guests are allowed to visit the dogs, at least according to their website. I had looked into it when the QE2 was sailing TA.

I think mm94065 meant (when he/she said in the cabin) was in the airplane pressurized cabin because bulldogs have the pushed in face that can cause breathing problems if they are kept in th cargo hold. This wouldn't be a problem at sea, obviously, because no pressurization required!