Trudi Atkinson qualified as a veterinary nurse in 1986 and attained the advanced diploma in companion animal behaviour therapy from the University of Southampton in 1999. In July of the same year she was accepted as a full member of the Association of Pet Behaviour Counsellors (APBC) and in 2000 left veterinary practice to start her own behaviour referral practice covering the South West of England. In 2003, she achieved accreditation as a Certified Clinical Animal Behaviourist (CCAB) under the scheme run by the Association for the Study of Animal Behaviour (ASAB). Although initially accredited as a clinical behaviourist for both dogs and cats. Cats have always been her preferred interest, and in early 2016 she started to specialise solely in feline behaviour. Trudi has presented talks on feline behaviour and companion animal behaviour in general for organisations including: the APBC, the British Veterinary Behaviour Association (BVBA), British Veterinary Nursing Association (BVNA), British Small Animal Veterinary Association (BSAVA) and the Centre for Animal Welfare (CAW). She is a founder member of the Fellowship of Animal Behaviour Clinicians (FABC) and served on the main committee during that organisation's formation and launch. In 2021 Trudi retired from all clinical and committee work and now concentrates solely on writing. Also, Trudi works with International Cat Care, and their veterinary division the International Society for Feline Medicine (ISFM), on their feline behaviour courses and the behaviour sections of their feline nursing courses. Trudi is the author of Practical Feline Behaviour, 2nd Edition and House Soiling Problems in Domestic Cats part of a series on Domestic Cat Behaviour Problems. She is a key contributor to books including Companion Animal Behaviour Problems all published by CABI.