Declining health...

My father has been having a great deal of trouble with his health over the last couple of months. For some reason he is having difficulty walking and is now using a couple of canes. He is considering getting a scooter or possibly a free spirit knee walker to help. I really wish that he were more persistent with getting his doctor to figure out why he is having trouble walking. My concern is that he will give up trying to stay strong and need to use a wheel chair. There has to be some reason why his legs would be failing as rapidly as they seem to be. I may have to insist on going to see his doctor with him and see if there are answers that my father is not conveying to me.