Christopher Day has used homoeopathy as a vet since 1972, having previously treated himself with homoeopathic medicines from his early teens. He is Hon. Sec of the British Association of Homoeopathic Veterinary Surgeons, Veterinary Dean to the Faculty of Homoeopathy and was the first President of the International Association for Veterinary Homoeopathy. In the early eighties he organised veterinary courses at the Faculty of Homoeopathy in London which were later accredited by the IAVH and has since lectured extensively in Ireland, Sweden, Norway, Denmark, USA, Holland and Germany.

Chris has written numerous books on the homoeopathic treatment of animals and is actively involved in several national and international animal welfare issues. He has also undertaken clinical trial research in several species and some of this work has been published in the Veterinary Record, IJVH, BHJ and other journals. He is now course leader of the HPTG Veterinary Course.