[Bjeanj]

Keeping in mind I am not a doctor, there are many reasons why a person’s appetite declines. Decline in sense of smell, depression, dental problems, change in medication, etc. While it’s good that the doctor has checked him, you have lived with him for (how many years?), so you know him very well.

Keep an eye on him, and in the meantime, make sure that what he *does* eat has plenty of healthy calories. If it seems as if he is losing weight, follow up with his doctor. As long as his activity level doesn’t decline, as pbkmaine suggests, perhaps it’s a natural progression due to age. He’s lucky he has you to keep an eye on him.