M.R.
Welcome Shay!
Wow, four boys!! I can't even imagine.
How did your parents feed you when you were a child? When I was a child, either I ate what was in front of me (always salad, veggies, meat and potato/rice/pasta) or I didn't eat. So, they can't eat Mc D's or fast food if you don't get it for them. I suggest you start buying groceries and cook more at home. Every one eating together is a great way to connect as well and builds great habits for the future. If you need help cooking certains foods, this is a great site for ideas or www.ichef.com is good as well. I know it is impossible to eat perfectly all the time but you can do it more often than not.
*hugs* Good luck!