Living Together Successfully

How do I know they are comfortable?

Look for relaxed resting, normal appetite and toileting, voluntary movement between rooms and the ability to ignore each other. Gentle voluntary contact can be positive, but separate beds are equally valid. Both should be able to stop an interaction. A cat living only on a cupboard because the floor feels unsafe is different from a cat freely choosing a high perch.

Food, water, litter and belongings

Feed separately if either animal steals, rushes or guards food. Use species-appropriate complete diets: dog food does not meet a cat’s nutritional needs, and regular access to cat food can unbalance a dog’s diet. Prevent access to therapeutic diets. Provide water in more than one safe location. Keep litter trays clean, quiet and reachable without passing the dog; a useful starting point for cats is one tray per cat plus one extra, spread out rather than clustered. Prevent dogs accessing cat waste. Give each animal undisturbed beds and remove contested toys during shared time.

Can this work in a flat or smaller home?

Usable space matters more than floor area alone. Use secure doors, separate activity times, covered hiding places and stable raised routes for cats. Avoid a single narrow route to every resource. Provide low-level dog-free refuges or ramps for cats who cannot climb. Check furniture is stable and windows and balconies secure. If separation leaves either animal confined without a comfortable daily life, reconsider the arrangement before adding another pet.

Routines, visitors, play and household noise

Protect rest and individual attention. Give dogs appropriate walks, sniffing and training; provide cats with separate interactive play, scratching and foraging. Do not use one animal to exercise the other. Before visitors arrive or exciting play starts, offer separate comfortable spaces. Teach children to leave resting animals alone and keep escape routes clear. In larger groups, check quieter individuals are not displaced by confident animals.

When I am at work or asleep

During introductions or after any concerning incident, use secure separate areas. For established households, decisions about unsupervised access need a consistent history of comfort, reliable resources and an individual risk assessment; no number of successful meetings guarantees safety. Retain separation whenever uncertain, especially with vulnerable animals or a history of pursuit. Cameras may reveal behaviour but cannot prevent injury. Avoid leaving leads or houselines attached.

Gardens, doorways, holidays and temporary care

Manage departures and returns so dogs cannot rush cats at doors or cat flaps. Familiarity with an indoor cat does not guarantee safety with a running cat outdoors. Secure the dog separately while the cat moves through a shared doorway if needed. Follow appropriate settling and veterinary advice before a new cat goes outdoors. Give carers a written plan for doors, feeding, medicines and separation; practise it before travel. Do not introduce unfamiliar visiting animals during your absence.

Medicines, parasites and preventative care

Never share medicines or use a dog-only flea treatment on a cat. Concentrated permethrin dog products can poison cats, including through contact with a recently treated dog. Ask the vet for a plan suitable for both species, follow the exact product’s separation instructions and seek immediate veterinary advice after suspected exposure rather than waiting for signs. Discuss vaccination and parasite prevention separately for each animal’s age, health and lifestyle. Shared housing does not mean identical vaccination schedules or that every infection passes between species.

Keep hygiene proportionate

Remove waste promptly, wash hands after litter cleaning and before food preparation, and clean bowls and bedding regularly. Separate an unwell animal where advised by the vet, with their own essentials. Persistent appetite, toileting or behaviour changes deserve assessment; a cat struggling to pass urine needs urgent veterinary attention. Good routines support welfare without turning an ordinary shared home into a clinical environment.

Related guidance

• Behaviour and body language
• Multi-dog households
• Puppy care
• Buying or adopting