How old are they?
Without even a token effort, yes I would if this is happening regularly.
If they appear later and say they're hungry, then out with the dinner again! Genuine dislikes are understandable, but a blanket refusal each time is not on.
Could they be involved in choosing what they have - within reason - either between two or three things which you are happy with too. Maybe helping you to prepare it too might interest them?
Eating with children helps too, I think, but often we don't for various reasons and I feel bad about it.
Good luck - I know mealtimes are very hard at times.