At an older age dogs need a specific diet, most likely must contain quality protein and fat. Also, he must be encouraged to drink water frequently because they dehydrate much faster.
Check his teeth, because gingivitis is the most frequent disease in older dogs, because of that it is recommended to administrate dry food so as the tartar shall be removed. You must provide your dog with the best-rated dog beds. You can purchase the best bed for old dogs via https://betterworldpets.com/collections/dog-beds.
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We must, also, pay special attention to the environment where the dog lives, the stress must not be present in his life. Just like humans, they desire a relaxed life and deserve a decent living. We can help him by reducing the noise level in the house and by not moving furniture or other objects because we will disorient him.
Be careful and examine his behaviour, you know him the best and you can figure it out when something is wrong so as to, if you find out that he is not ok, you will solve the problem in good time.
Do you know that old dogs can suffer from dementia and senility?
Some signs that indicate these kinds of affections are disorientation, he does not respond when you shout his name, he forgets that he ate and demands food again, he forgets where he defecates and he does not want to go outside, he remains blocked in tight places, he walks chaotic in the circle, he barks and frets with no reason.
If you see something like this, go fast to a veterinarian for more investigations, so as to try to ensure a comfortable life for the time he has left.
Also, seniors, because of the circulatory problems they react to cold by shivering, involuntary teeth etc., in spite of the fact that they have fur which should offer protection against bad weather. Life expectancy at dogs is influenced by the environment and the nutrition they get. If they are well cared for and they eat healthy food, it is normal for a dog to live many years.