If you ask me, it's pretty simple. Sonic has their foods in the FatSecret food database. Install the phone app, and register EVERYTHING you eat there, along with a very honest evaluation of your exercise (calories burned). As long as you consume less calories than you burn, you won't have a problem eating Sonic's food. Obviously, it's still about trying to eat healthy and all that, but a little junk food here and there won't kill you. Just count it, and compensate elsewhere.
I can recommend you watch the movie Fat Head: http://www.youtube.com/watch?v=evcNPfZlrZs
- there are some great tips and thoughts on this.
"Losing weight is never about eating as little as possible"
"You wouldn't worry so much about what others think of you if you realized how seldom they do.
― Eleanor Roosevelt
"Do. Or do not. There is no trying."
- Master Yoda.
From October 4th 2010 to April 3rd 2012 I lost half my body weight - 80 kilos/170 lbs. Since then, I have had two cosmetic surgeries to remove excess skin. I have now quadrupled my strength, gained several kilos in muscle mass, and today I focus on building muscle, optimizing my diet, and living healthy. I am stronger, healthier, thinner, happier!