Some sects of Hinduism for example Vaishnavism Keep to the purest sort of vegetarianism as a great when Shaktism and Tantric sects freely consume chicken, mutton (goat and sheep meat), fish and eggs. The reasons said by Jains and Vaishnavas are: the basic principle of nonviolence (ahimsa) applied to animals;[181] https://www.cureayu.com/blogs/weight-management/high-protein-foods-for-weight-gain