Do you have to buy train tickets for a dog? I never have , and I've had my ticket checked a number of times. My dog has never been asked for a ticket

Totally agree that dogs shouldn't be on seats (and neither should feet). Makes me feel a bit sick sometimes to see the state of the seats. Often I prefer to stand. Anyway I spend all day sitting on my backside in an office so I'm sure standing for a few stops won't do me any harm....