No.
I ask all relevant questions before the dinner.
At the dinner, I keep my anxieties to myself as much as possible. Meals are like gifts in that once you give them to someone, what they do with it afterward is none of your business.
If I had a dinner guest who had barely eaten anything, I'd assume my cooking didn't agree with her. Rather than making her uncomfortable by putting her on the spot about why she ate so little, I'd make an open ended offer of another food option like "I was thinking of putting out a plate of sliced cheese and fruit for us all to nibble on with the coffee, do you think folks would like that?" If she didn't like the dinner and was still hungry, she can say "Yes" and fill up on cheese and fruit. If she just wasn't hungry that day, she could say "No" and no harm done, no-one embarrassed.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson