Why Cats Scratch: Behaviour, Territory and Claw Health
If your cat is scratching the sofa, the doorframe, or the corner of the carpet, it can feel like deliberate misbehaviour. In reality, scratching is one of the most natural and necessary things a cat can do. Far from being destructive, it is a complex behaviour that serves multiple physical and communicative functions. Understanding why cats scratch is the first step to managing it successfully — without frustration on either side.
The Three Core Functions of Scratching
Cats scratch for three distinct and equally important reasons, and no amount of training will ever eliminate the behaviour entirely, nor should it. The goal is always to redirect, not to suppress.
Claw Maintenance
Cats shed their claws in layers, much like peeling an onion. The outermost sheath of the claw is dead tissue that needs to be removed regularly to reveal the sharp, healthy claw underneath. Scratching against a textured surface achieves this efficiently. If you have ever found a small, translucent, hollow claw on the floor or embedded in a scratching post, you have seen this process in action. This is entirely normal and a sign your cat is grooming themselves correctly.
Stretching and Physical Conditioning
When a cat reaches up and drags their claws downward on a vertical surface, they are performing a full-body stretch. This movement extends the spine, engages the flexor muscles in the shoulders and forelimbs, and helps maintain flexibility. It is often one of the first things a cat does after waking from sleep — equivalent to a human morning stretch. This is why scratching posts placed near sleeping areas are used far more consistently than those placed in out-of-the-way corners.
Territorial and Scent Marking
Scratching is a form of communication, both visual and chemical. The scratch marks themselves are a visible signal to other cats: a record of size, height, and presence. More importantly, cats have interdigital glands located between the toes of each paw. These glands deposit pheromones onto the scratched surface with every stroke, leaving an invisible chemical message that other cats can detect. Scratching in prominent locations — near entry points, doorways, and central areas of the home — is a territorial statement. In multi-cat households or homes where outdoor cats are visible through windows, this marking behaviour often intensifies.
Why Cats Choose Your Furniture
Cats do not scratch the sofa to annoy you. They scratch it because it fulfils the criteria they instinctively seek: it is prominent, vertical, stable, and located in a high-traffic area near where they sleep or rest. A scratching post tucked behind a door in a spare bedroom does not serve these functions. Location is everything. Cats scratch at the heart of their territory, not at its edges.
The texture also matters. Many cats prefer softer, shredding fabrics — sisal rope, corrugated cardboard, or the loosely woven material of certain sofas — over harder surfaces. Observing what your cat targets tells you a great deal about what kind of scratching post will work for them.
How to Redirect Scratching Effectively
Redirection, not punishment, is the approach supported by the International Society of Feline Medicine (ISFM) and the Association of Pet Behaviour Counsellors (APBC). Punishment — spraying with water, shouting, or physically removing the cat — increases anxiety, which can itself increase scratching as a self-soothing behaviour.
Choose the Right Scratching Post
The single most common reason scratching posts are ignored is that they are too short. A cat must be able to fully extend their body when scratching. The minimum recommended height for a vertical post is 90 centimetres. The post must also be completely stable — any wobble when the cat leans into it will put them off immediately. Sisal-wrapped posts are preferred by the majority of cats, though some individuals prefer corrugated cardboard horizontal scratchers.
Placement is Critical
Place scratching posts directly next to the areas your cat currently scratches. Once the habit is established and your cat is using the post reliably, you can gradually move it a few centimetres at a time to a more convenient position. Place posts near sleeping areas and at the entrances to rooms — the same prominent locations cats instinctively choose.
Use Pheromone Attractants
FeliScratch by Feliway is a pheromone spray designed to attract cats to scratching posts. It contains a synthetic version of the interdigital pheromone that cats deposit when they scratch, essentially telling the cat: "this is where scratching happens." Applied to a new post, it significantly increases the likelihood of uptake.
Deter Furniture Temporarily
While the cat is learning to use the post, covering the previously targeted furniture with double-sided adhesive tape is an effective short-term deterrent. Cats dislike the sticky sensation on their paws and will quickly lose interest in that surface. This is most effective when paired with a desirable alternative placed nearby.
When Scratching Increases Suddenly
If a cat that has never been a problem scratcher suddenly begins marking intensively, look for a trigger. A new cat in the neighbourhood — even if only glimpsed through a window — is one of the most common causes. Other triggers include a new pet or person in the home, building works, rearranged furniture, or any disruption to routine. Increased scratching in this context is a stress response and a communication signal. Addressing the underlying anxiety, rather than simply discouraging the scratching, is the correct approach. Feliway Classic diffusers, environmental enrichment, and interactive play can all help reduce anxiety-driven scratching.
On Declawing: Why It Is Not a Solution
Declawing — the surgical removal of a cat's claws — is illegal or strongly discouraged in most European countries, including the United Kingdom, and is considered inhumane by the ISFM and the majority of veterinary bodies worldwide. The procedure does not simply remove the claw: it involves the amputation of the third phalanx of each digit, equivalent to removing a human finger at the last knuckle. The consequences include chronic pain, altered gait, litter tray aversion due to pain when digging, and increased biting behaviour as the cat's primary defence has been removed. It does not solve the underlying behavioural need to scratch — it simply removes the cat's ability to fulfil it safely.
Interactive Play and Enrichment
Cats that are physically and mentally stimulated scratch less destructively. Daily interactive play sessions using wand toys, puzzle feeders, and opportunities to climb and explore help reduce the tension and excess energy that can drive excessive furniture scratching. The ISFM recommends at least two dedicated play sessions per day for indoor cats, each lasting a minimum of ten to fifteen minutes.
Scratching is not a problem to be solved — it is a natural feline behaviour to be accommodated. Provide the right resources in the right places, reduce unnecessary stress, and your cat will have little reason to choose your furniture over a well-positioned, appropriately sized scratching post.