You could say they felt well -- to indicate that they didn't become ill.
You could say they felt good -- to indicate they enjoyed the meal.
Now I am confused.
What about these sentences?
I am happy to say that everyone in my family felt good/well after eating my meal.
Is it well because it is an adverb that describes felt?
2 answers
This site may help you.
http://englishplus.com/grammar/00000218.htm
http://englishplus.com/grammar/00000218.htm