Weigh their food and also how much they leave, that way you can see if you are worrying about nothing.... If they eat about 4lbs in total per day, plus fruit/veg (and they are in good condition) they should be ok.
In the last two weeks I normally feed four meals, with the last one a smaller late-night snack, as by then I will be checking at 10pm anyway.
However I have found that quite often they do not eat that much anymore. I also switch to lower protein goat mix (mine is 15%) in the last 6 weeks, and they get a mixture of that, sugarbeet shreds soaked (and weighed soaked) and rolled oats. PLus carrots, any fruit and veg that is around and they like; on top of their rations.
If they eat most of their feed, and don't start all of a sudden to become really picky and look like they have lost interest in eating all together I wouldn't worry. However if they do - drench with either twin lamb stuff or propylene glycol fairly quick.