There are many things to consider when choosing a bed for your dog. The first and foremost factor is the size of the bed. You need to find a dog bed that is big and strong enough to suit your dog's size and temperament. They can fit your dog by taking a few measurements.
To do this, measure your dog while standing. Start by measuring from the tip of the nose to the base of the tail. Then measure from the floor to the shoulder or head. If you want to buy a dog bed, you will need to add 12 inches to the two sizes you take. This will give you an approximate width and length for a flat dog bed. You can navigate here to find the best dog beds.
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Next time measure your dog in his favorite sleeping position; it may be its length when fully stretched, or its diameter when crimped into a ball. For nest beds, measure the length of your dog while curled up in a sleeping position.
To do this, measure from the top of the head to the point where the tail meets the back, then add 7 to 9 inches to that measurement. The most comfortable dog bed for your dog is usually slightly larger than your size.
If your bed is too small, your dog may not feel comfortable. You need to allow room for growth when your dog is young and you want to make sure he can move even if your dog is still growing or is fed up.