I know just how your dad feels, I was having a family meal out and couldn't manage to cut the meat on my plate and felt so embarrassed, my grandson of 15 had to do it for me, you do feel that all eyes are on you, when in actual fact a lot of folk are more interested in their own meals and conversations than what is going on around. I have'nt noticed anyone looking at me, it is just a feeling you get. I hope your Dad still gathers enough courage to carry on enjoying his meals out which he enjoys or enjoyed so much, I know I will regardless! Give him as much encouragement as you can.
Good luck Sheffy