Hi Teez
A warm welcome to TP
I know my dad likes to eat - it's something that can calm him and comfort him
and at times he is not sure what is food and what isn't - he tried to eat a domino thinking it was a biscuit - and he doesn't always recognise drinks as they are in a beaker or mug and I think he just 'sees' the container not realising the drink is inside it - I keep a careful look out when it's a meal time and coax him along with drinks
so I guess this is part of the dementia
I think there's a particular form that does affect eating in that the person will just eat and eat - I'm sure someone with specific knowledge will offer more information