Dog beds are one of the easier purchases to get wrong, because the deciding factor isn't in the product description. It's in how your dog already sleeps.
Spend a week noticing. Most dogs default to one or two positions, and each one points at a different bed.
Read the sleeping position
The curler. Nose tucked into the tail, body in a tight circle. This dog wants a raised edge to press into, a donut or bolster bed. The rim isn't decoration; it's the thing the dog is looking for. A flat mat leaves a curler with nothing to brace against and they will usually go find a corner instead.
The sprawler. Flat out on one side, legs extended, or belly-down with the back legs stretched behind. This dog wants surface area and nothing in the way. Bolsters actively get in the way here. You will see the dog's head and legs hanging off the side, which means the bed is doing nothing. A flat mattress or mat is the right answer, and it should be larger than you think.
The leaner. Sleeps flat but always with the head or back propped against something. A wall, a sofa base, a person's leg. A bed with a raised edge on one or two sides gives them that without needing the furniture.
The burrower. Digs at the bedding, pushes it into a pile, tries to get underneath. Suits a bed with a loose blanket layer or a cave-style design. Fighting this one is pointless; the digging is instinctive.
Plenty of dogs switch depending on the temperature. Curled in winter, sprawled in summer. If yours does both, a bolster bed with a large flat interior covers both cases.
Sizing
Measure the dog lying down in their most extended position, nose to the base of the tail, then add roughly 15 to 20 centimetres. That's your minimum interior length. Note the word interior: on a bolster bed, the outside dimension includes the rim, and the usable space inside can be a third smaller than the box implies. Check the interior measurement, not the overall one.
Sizing up is almost always safer than sizing down. Very few dogs object to too much room. Every dog objects to a bed they overhang.
For a puppy, size for the adult dog and accept that the bed will look comical for a few months. Buying three beds as they grow costs more than buying one that's too big for a while.
Elevated and cot beds
These sit on a frame with fabric stretched across it, holding the dog several centimetres off the ground. They solve a specific set of problems well:
- Airflow underneath, which matters in hot weather far more than any cooling gel insert
- Off cold or hard floors, which is the point in a garage, on a tiled kitchen floor, or outdoors
- Easy cleaning, most can be hosed and dried in minutes, which is why they're common for outdoor and travel use
- Nothing to hollow out, so no compressed foam to replace
What they don't provide is cushioning or a rim. A dedicated curler will usually not love a bare cot. A sprawler often prefers it to anything else, especially in summer.
Materials and cleaning
The single most useful feature is a removable, washable cover with a full-length zip. Everything else is preference; this one determines whether the bed is still usable in a year. Beds that have to be washed whole either don't fit in the machine or come apart in it.
Water-resistant liners sit between the cover and the filling. Worth it for puppies, senior dogs, and anything that comes home wet. Without one, a single accident soaks into the filling and the smell never fully leaves.
On filling: shredded foam and polyester fibre are the common options. Fibre is lighter and cheaper but compresses faster. A fibre bed under a heavy dog can flatten within months. Solid foam holds its shape longer. For a large or older dog, a thicker foam base is the part of the spec worth paying attention to.
Where to put it
Dogs are social sleepers. A bed in the room where the household actually spends time gets used; a bed in an unused spare room usually doesn't, no matter how good it is.
Avoid the middle of a walkway, dogs prefer a spot with a wall or furniture at their back and a view of the door. Away from direct draughts, and away from radiators, which most dogs find too warm to sleep against.
If your house has two floors and your dog follows you between them, two cheaper beds beat one expensive one.
When to replace it
Press down in the middle with your hand. If it compresses to the floor with no resistance, the filling is finished and the dog is effectively sleeping on hard ground.
Other signs: the dog starts sleeping somewhere else, the cover has thinned to the point of tearing, or the smell survives a wash. Under a large dog, expect to replace a fibre-filled bed considerably sooner than a foam one.
A note on older dogs
Dogs that are stiffening up need two things: a thicker, firmer base so they're not resting joints on the floor through a compressed pad, and a low entry height so getting in and out isn't an obstacle. A tall bolster rim that a young dog vaults over easily can become the reason an older dog stops using the bed.
If your dog is having noticeable difficulty getting up, lying down, or settling, that's worth raising with your vet rather than solving with bedding alone.