Animal welfare: Is it safe for cats to be vegan?
Is it OK to feed cats a vegan diet?
Alongside a growing trend of veganism, more cat owners now want to share their animal-friendly values with their feline companions.
That preference sparks a serious question that scientists, vets and vegans' can't agree on - can cats be vegan?
BBC News has been to see Joanna Farr, an owner with two vegan cats.
Video Journalist: Adam Paylor