Is this bed good for an older dog?

The memory foam base is the point: it spreads weight and cushions hips and elbows, which suits senior dogs and dogs with joint stiffness. It is flat, so a dog that likes to lean against a bolster may prefer a different style.

Can the cover be washed?

Yes. The polyester cover is removable and can be machine washed, which is the main reason to choose it over a fixed-cover foam bed.

No. The polyester cover is fabric, not a waterproof liner, so accidents and drool can soak through to the foam. Use a waterproof liner underneath if that is a concern.

Will it fit a large breed?

It is sized for large to extra-large dogs, with a flat sleeping surface rather than a cramped oval. Measure your dog stretched out, nose to tail, before choosing.

Does it have raised sides?

No. It is a flat, low-profile bed with no bolsters, so it suits dogs that sprawl but not dogs that like to rest their head on a rim.

How thick is the foam?

The bed is low-profile, roughly 1.75 inches at its highest point, so the foam is a modest layer rather than a deep mattress. Very heavy dogs may compress it over time.