The case for an elevated cot is one thing: the air gap underneath. Everything else about this decision follows from it.
A cushioned bed works by putting material between the dog and the floor. A cot works by putting nothing between the dog and the floor except air. Those are opposite strategies, and which one is right depends less on the dog than on where the bed is going and what time of year it is.
What the air gap actually does
It carries heat away. A dog lying on foam is lying on an insulator. Body heat goes into the fill and stays there, which is exactly why a hot dog gets off the expensive bed and lies on the tile. On a mesh cot, air moves under the whole underside of the dog and takes heat with it. In summer this is the entire point.
It keeps the dog out of whatever is on the ground. Damp concrete, dust, a wet porch, cold tile, a muddy patch by the door. A few inches of clearance solves all of it at once.
It makes cleaning trivial. A taut mesh surface takes a hose and is dry shortly afterward. A foam bed that has absorbed mud is a laundry problem, and if water gets past the cover into the foam it becomes a smell problem for the life of the bed.
What you give up
Pressure relief. A cot is a firm, flat surface. It spreads weight across the contact area rather than letting hips and elbows sink in. That is fine for a dog with healthy joints and wrong for a bony senior with sore ones. This is the real dividing line between the two products.
Warmth. The air gap works in both directions. In a cold room a cot removes precisely the insulation the dog was looking for. Dogs that seek out heat will abandon a cot in winter, and they are right to.
Acceptance. Some dogs dislike the taut, faintly springy surface and never settle on it. There is no arguing a dog out of this and no way to know in advance.
Sides. Most cots are flat platforms. A dog that sleeps curled against a bolster with its head up on a rim is not getting that from a cot.
Choose by location, not by dog
Most households that own both are not really choosing. They have one in each place.
- Porch, patio, garage, kennel run, truck bed. Cot. Outdoors or half-outdoors, the hose-off and the clearance from wet ground decide it on their own.
- The spot where the dog actually sleeps at night. Cushioned, in almost every house.
- Crate. Depends on crate height and whether the room gets cold overnight. A low pad is often the more practical answer inside a crate.
- Summer, hard floors, a thick-coated dog. Cot, and it will get used.
- Winter, a senior, a lean short-coated dog. Cushioned.
What to look at on a cot
The frame and the corners carry the whole product. Aluminum does not rust, which matters on something that lives outside and gets hosed down. The corners are where cheap cots fail — either the fabric tears out of the frame channel or a joint works loose and never tightens again.
Treat the weight rating as a total rather than a per-dog figure, because dogs pile up on each other. And check the surface tension: mesh that already sags out of the box will sag further, and a sagging cot eventually lets the dog touch the ground, which removes the only reason to own one.
What to look at on a cushioned bed
Whether it bottoms out under your dog. That is the whole question, and it is covered properly in our piece on what "orthopedic" actually means. After that: a removable washable cover, and a waterproof layer between the cover and the fill if your dog comes home wet.
The honest limitation
Neither one is a year-round answer in a climate with real seasons, and anyone who tells you otherwise is selling the one they have. A cot in January and a foam pad in July both get ignored by the dog.
Buy for the problem you have now — heat and mud, or joints and cold — and accept that the other half of the year may want the other one.
Our Airframe Elevated Cot is a textilene mesh bed on an aluminum frame, nine inches off the ground and rated to 110 lb total. We don't currently stock the padded side of this decision — we pulled the foam bed we had rather than keep selling it as orthopedic when the foam density didn't support the word.