The RSPCA recently warned owners of cats on vegan diets they could face prosecution.
But 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