The indoor cat is the under-exercised cat. The evolutionary reality is that the domestic cat, even after ten thousand years of cohabitation with humans, retains the hunting instincts of its wild ancestors. The wild cat hunts roughly 8 to 12 small prey per day, with each hunt involving stalking, chasing, pouncing, and subduing. The total daily energy expenditure of a hunting cat is roughly 20 to 30 percent of its daily caloric intake, with the rest going to basal metabolism. The indoor cat that eats commercial food from a bowl and spends 22 hours a day on the couch has an energy expenditure of perhaps 5 to 10 percent of its daily caloric intake in activity. The gap between 20 and 5 percent is the gap between a healthy cat and an obese one. It is also the gap between a behaviorally satisfied cat and a behaviorally frustrated one.
This article is the practical view of indoor cat exercise, written for the owner who knows the cat should be more active and wants to know what to do about it. We will go through why the indoor cat is the under-exercised cat, the metabolic cost of activity, the species-specific play preferences, the toys that work, the toys that do not work, the role of vertical space, the role of food puzzles, the role of the human in the play, the realistic daily quota, and the four mistakes that turn a well-meaning owner into the owner of an obese, frustrated cat.
Why the indoor cat is the under-exercised cat
The wild cat hunts to eat. The domestic indoor cat is fed from a bowl. The hunting instinct remains, but the act of hunting is removed from the feeding cycle. The cat that is fed twice a day from a bowl has no need to hunt, no opportunity to express the hunting behavior, and no outlet for the energy that would have been spent on the hunt. The cat that is fed in this way is using perhaps 5 percent of its daily caloric intake in activity. The remaining 95 percent is converted to fat.
The effects of chronic under-exercise in cats include:
- Obesity, with all its associated health problems (diabetes, arthritis, hepatic lipidosis, urinary tract disease)
- Behavioural frustration, which can manifest as aggression, destructive behavior, excessive vocalization, or compulsive behaviors (wool sucking, over-grooming, fabric eating)
- Muscle atrophy, particularly in the hindquarters, which reduces the cat's mobility and increases the risk of injury
- Reduced cognitive stimulation, which can contribute to feline cognitive dysfunction in older cats
- Increased night-time activity, as the cat that has not spent its energy during the day becomes active when the owner goes to bed
The fix is to provide exercise that mimics the natural hunting cycle. The owner who provides 15 to 30 minutes of interactive play per day, in sessions that mimic the hunt-stalk-pounce-kill sequence, will have a cat that is closer to its evolutionary exercise needs than the owner who simply leaves toys out and hopes the cat will play with them.
The metabolic cost of activity
A 4 kg cat has a daily caloric need of roughly 200 to 250 kcal for maintenance. Of this, perhaps 20 to 30 kcal is spent on activity in the wild. The indoor cat that is fed 200 kcal per day and does no activity is in positive energy balance by 20 to 30 kcal per day, which over a year is roughly 7,000 to 10,000 kcal of excess energy, or about 1 kg of body fat. The 4 kg cat that is fed the same amount but exercises 30 minutes per day is in better energy balance.
The realistic daily activity quota for an indoor cat is roughly 15 to 30 minutes of vigorous play, spread across 2 to 3 sessions. The vigorous play is the equivalent of a few hunts per day. The cat that gets this play quota has a metabolic rate that is closer to its wild counterpart, and is less likely to become obese.
The species-specific play preferences
The cat is a hunter. The play that mimics hunting is the play that engages the cat. The hunting sequence is:
- Stalk (the cat observes, hides, and watches the prey)
- Chase (the cat pursues the prey)
- Pounce (the cat grabs the prey with its front paws)
- Subdue (the cat bites the prey, often delivering a killing bite to the neck)
- Consume (the cat eats the prey in the wild; in play, the cat may briefly "kill" the toy and then lose interest)
The play that follows this sequence is the play that the cat finds satisfying. The play that breaks the sequence (the toy that runs away too fast, the toy that the cat cannot catch, the toy that does not respond to the pounce) is the play that the cat loses interest in.
Different cats prefer different play styles, but the play that mimics prey movement is the play that works:
- Birds are prey that fly. The cat that is interested in birds responds to toys that move through the air (feather wands, flying toys, toys on strings hanging from above). The motion is up-and-away, with sudden changes in direction.
- Mice and other small mammals are prey that run on the ground. The cat that is interested in mice responds to toys that scurry along the floor (small fuzzy toys, toys that drag behind a string, ping-pong balls, crumpled paper). The motion is along the ground, with sudden stops and starts, often disappearing under furniture or behind objects.
- Insects are prey that fly close to the ground. The cat that is interested in insects responds to toys that flutter close to the floor (small feather wands, bug-like toys on strings).
- Fish are prey that the cat does not actually hunt in the wild (cats do not generally fish, despite the cultural image), but the cat may be interested in toys that move in a swimming pattern in a bathtub or large bowl of water. This is a play preference for some cats and a curiosity for others.
Most cats have a primary prey preference (often birds, often mice) and a secondary preference. The owner who knows the cat's preference can tailor the play to the prey type.
The toys that work
Wand toys (feather wands, string wands, kicker toys). The most effective toys for interactive play. The wand allows the owner to control the toy's movement, mimicking the unpredictable motion of live prey. The feather wand is particularly effective for bird-preferring cats. The string wand with a small toy at the end (a mouse, a bug) is effective for mice-preferring cats. The kicker toy (a long, sturdy toy that the cat grabs with its front paws and "kicks" with its hind legs) is effective for the "kill" portion of the sequence.
Puzzle feeders (food puzzles, treat balls, foraging toys). The puzzle feeder is a feeding device that requires the cat to manipulate the toy to get the food out. The cat that is fed from a puzzle feeder spends 15 to 30 minutes per day on the puzzle, which is exercise of a different kind. The puzzle feeder is particularly useful for the cat that eats too fast, the cat that is bored, and the cat that needs cognitive stimulation.
Cat trees, climbing shelves, and vertical space. The cat is a climber. The cat that has access to vertical space is a cat that uses its muscles, exercises its balance, and has a territory to patrol. The cat tree or the wall-mounted climbing shelves are not toys in the conventional sense, but they are essential exercise infrastructure. The cat that has a tall cat tree will climb it daily. The cat that has wall-mounted shelves will use them to patrol the room.
Cardboard boxes, paper bags, and tunnels. Cats love boxes, paper bags (without handles, which can entangle), and tunnels. The cat that has a box to hide in, a bag to ambush from, or a tunnel to chase through, has an exercise outlet that does not require the owner's involvement. The "If I fits, I sits" meme is a real behavior, and the box is a useful piece of exercise equipment.
Rotating toy selection. The cat that has the same toys out all the time becomes bored with them. The owner who rotates the toys (leaving 3 to 4 out at a time, and rotating every few days) keeps the toys novel and the cat interested. The toys that have been "put away" for a week are essentially new toys when they come out again.
The toys that do not work
Laser pointers (used incorrectly). The laser pointer creates a dot of light that the cat can chase but never catch. The cat that is played with a laser pointer and never "catches" the prey can become frustrated. The fix: end the laser pointer play with a tangible toy that the cat can catch. The owner aims the laser at a physical toy (a stuffed mouse, a treat), and the cat pounces on the physical object at the end of the chase. The cat gets the satisfaction of catching prey.
Battery-powered toys (most of them). The battery-powered mouse, the battery-powered bug, the battery-powered fish — most of these move in predictable patterns that the cat quickly learns. The cat that has "solved" the pattern loses interest within minutes. The battery-powered toy that has random, unpredictable motion is rare and expensive. Most battery toys are best used as backup for the toys that require the owner's involvement.
Catnip toys (used as the only toy). Catnip produces a temporary euphoria in cats that are genetically responsive (about 50 to 70 percent of cats). The euphoria lasts 5 to 15 minutes, after which the cat is refractory to catnip for about 30 minutes. The cat that is given a catnip toy as the only toy is a cat that plays intensely for 15 minutes and then ignores the toy for the rest of the day. The catnip toy is a useful addition to the toy collection, not a substitute for the wand toy or the puzzle feeder.
Toys left out indefinitely. The toy that is always available is the toy the cat ignores. The cat's prey drive is engaged by novelty. The toy that has been on the floor for three months is not novel. The fix: rotate the toys (3 to 4 out at a time, rotated every few days).
The role of the human
The most effective exercise for an indoor cat is interactive play with the owner. The wand toy is the standard tool. The owner waves the wand to mimic prey movement, the cat stalks and chases, and the owner adjusts the movement to keep the cat engaged (faster when the cat is energetic, slower when the cat is starting to tire, hiding behind furniture to encourage the stalk, "dying" when the cat catches the toy to encourage the "kill").
The session should last 10 to 15 minutes per "hunt," and the cat should be allowed to catch the toy several times during the session. The owner who never lets the cat catch the toy is the owner of a frustrated cat. The "catch" is the reward for the stalk and chase.
The session should end while the cat is still interested, not when the cat is exhausted. The cat that ends the session by losing interest is a cat that will be reluctant to play next time. The cat that ends the session by catching the toy and walking away is a cat that had a satisfying hunt.
The session should be at a consistent time of day. Most cats have a peak activity period (often early morning or early evening), and the play session should be scheduled around this peak. The cat that is played with at 7 am every morning is a cat that anticipates the play and is waiting at the play spot at 7 am.
The role of food puzzles
The food puzzle is the most under-used tool in the indoor cat exercise arsenal. The cat that is fed from a puzzle feeder spends 15 to 30 minutes per day working for the food, which is exercise of a different kind. The food puzzle also slows down eating (useful for the cat that eats too fast and vomits), provides cognitive stimulation, and gives the cat a sense of "earning" the food that is closer to the wild hunting-and-eating cycle.
The food puzzle options:
- Treat balls (Kong, PetSafe SlimCat): the cat bats the ball around to dispense treats or kibble. Good for the cat that is just starting with puzzles.
- Foraging mats: the cat picks kibble out of the mat's fabric folds. Easy to medium difficulty.
- Slider puzzles: the cat moves sliders or lids to access the food. Medium to high difficulty.
- Tower puzzles: the cat removes cups or blocks to access the food. High difficulty.
The owner should start with an easy puzzle (the cat must be able to access the food within a few minutes) and gradually increase the difficulty. The cat that is given a puzzle that is too hard will lose interest and the owner will conclude the puzzle "does not work." The puzzle does work, but the difficulty must be matched to the cat.
The four mistakes
Mistake 1: Leaving the toys out and expecting the cat to play with them. The cat that has a basket full of toys does not play with them. The cat that has a few toys out, with the owner waving one of them, plays enthusiastically. The cat's prey drive is engaged by movement, and the toys that are just sitting on the floor are not moving. The fix: interactive play with the owner is the foundation. The toys that are left out are supplementary.
Mistake 2: Using the laser pointer without a tangible "catch." The laser pointer that is waved around the room with no end point produces a frustrated cat. The cat chases, never catches, and becomes increasingly aroused without resolution. The fix: end the laser play by aiming the laser at a physical toy or treat, and let the cat catch the tangible object. The cat gets the satisfaction of the catch.
Mistake 3: Feeding only from a bowl. The bowl-fed cat eats in 2 minutes and has no outlet for the foraging instinct. The fix: feed at least part of the daily ration from a puzzle feeder, and rotate the puzzle. The cat that works for the food is the cat that is closer to its wild foraging behavior.
Mistake 4: Skipping play sessions because the cat "seems fine." The cat that is not played with is a cat that does not show obvious distress until the obesity, the behavioral frustration, or the medical problem becomes severe. The owner who skips play sessions because the cat "seems fine" is the owner who notices the problem only when it is advanced. The fix: 15 to 30 minutes of interactive play per day, every day, regardless of the cat's apparent contentment.
Closing the loop
The indoor cat is the under-exercised cat, and the under-exercised cat is the cat at risk for obesity, behavioral frustration, and a host of secondary health problems. The fix is 15 to 30 minutes of interactive play per day, mimicking the hunting sequence, in a method the cat accepts, with toys the cat engages with, plus puzzle feeders and vertical space. The cat that gets this daily quota is closer to its evolutionary exercise needs than the cat that is left alone with a basket of toys. The owner who provides the play, who avoids the four mistakes, and who feeds from a puzzle, will have a cat that is healthier, more behaviorally satisfied, and less likely to develop the secondary problems of under-exercise. The cat is the same. The difference is the routine.
