Vegetarianism
Talk0Vegetarianism was the practice of following a diet which excluded meat. The Sixth Doctor became a vegetarian, (TV: The Two Doctors) but soon gave it up. (COMIC: Salad Daze) The Dream Lord mentioned this to the Eleventh Doctor, calling him "veggie". (TV: Amy's Choice)
Jo Grant approved of vegetarianism, and often thought of becoming one. (PROSE: Catastrophea)
The Fifth Doctor's companion Peri Brown was a vegetarian and therefore baulked at the thought of eating roast boar at a banquet thrown in their honour by Pharaoh Erimem in Egypt in 1400 BC. The Doctor advised her to pretend to have eaten it by moving it around her plate. (AUDIO: The Eye of the Scorpion)
Melanie Bush was a vegetarian from the age of thirteen. (PROSE: Millennial Rites) She believed that it was wrong to eat meat. (PROSE: Business Unusual)
Sam Jones was a vegetarian. (PROSE: The Eight Doctors)