N.
We use both Dr. Eric Hopkins and Dr. Andrew Kilgus (one for my son and one for my daughter) who have an office in Grapevine. They are part of the Cooks Children's network of doctors and they have an after hours urgent care line you can call where a nurse will call you back with info regarding your child's condition. They don't charge for it either. I guess it's not really an "advice" line, but any time I have a health related question and it's after hours, I call and I always get a call back.
Just this past Saturday, my 8 year old daughter had a very nasty looking bug bite we called about and the nurse had us to go the Cooks Children's Urgent Care Center in Hurst because the bite had become infected and they said it couldn't wait until Monday to be treated.
I've also called about fevers, excessive crying, rashes, colds, cuts, bruises, croup and a host of other things that have come up after the doctor's office has closed and I've always been given great information and advice each and every time.
I'm guessing all Cooks Children's pediatricians offer this service but I guess you would have to call the individual offices to be sure. The number to Dr. Hopkins and Dr. Kilgus is ###-###-####. It's a very busy office so when you go in, you often times have to wait, but I love both doctors and I love the after hours urgent care line. I don't know what I would have done without it.
Good luck!