They look fine.
You noticed earlier (this morning) that they were skinnier. Now they look round and plump again, so the doe probably fed them in between the morning photo and these evening photos. This will sound a little silly, but I can't think of a better way to say it: their skin wrinkles DIFFERENTLY now than in the morning photos. This time the wrinkles look fatter
As for recognizing bunnies that are not getting enough to eat: starving bunnies become very obvious, and can look like a living skeleton for a while before they actually die. (That would be the time to consider bottle feeding.) Yours are nothing like that. Yours are doing great.