My whippet will be 15 in January. I got him when he was 11. There is a questionnaire (for the life of me I cannot recall where i saw it) for canine cognitive dysfunction. Poor Boo has it. He gets lost in the house sometimes and forgets what he was doing. He tends to sleep A LOT. He doesn't seek the greys out, but he has no fear of them and usually walks underneath them. However, he is happy and eats like a champ. I have him on Cholodin, which seems to help. Anipryl (I think that is the medication - it is used primarily for Parkinson's in humans) is recommended but is very costly. I also had him try ProNeurozone (you can get that from Amazon) but I didn't see any improvement.
Several times I think he is getting ready to go, but he has yet to really give up. Winter is really bad for him. Not the weather so much, but that it is always dark when I can get them outside. He does sundown, so I have lights on timers to go on and keep the house lit. I also have a dog door, which has helped a lot. He tends to forget that he needs to go and, therefore, would constantly have accidents. He goes outside to do his business, forgets why he was there, comes back in, remembers, goes back out.
Can you tell I love my little old man?
Good luck and you can pm me if you have any other questions or need to commiserate.
Cindy