Sounds like our dads were and are very similar in some respects Rosie. I never thought I'd miss those days either but now I'd give anything to see him so lively again. Isn't it just the most awful illness, we're 11yrs in and have taken many steps down in that time. Still, we soldier on.... Px
Oh Pheath, I know what you mean about wanting dad to be back there again. I wish I had that problem now. Just like your situation, my dad is not that interactive anymore, he would not know if there was a child around now, and they still do give him hugs at the home he is in but I don't know if he realises anymore.
At the time (last year) it was a nightmare and I didn't know how to cope with it a lot of the time, but I so wish I had that problem now.
And yes, my dad would notice fat people as well, although he would comment quietly in my ear!
Take care Rosie xx