T.F.
First of all... I am sorry you went through this. We all go through some sort of issue similar at some time or another on public property.
I am NOT a sue happy person and because SO many people who are so SUE happy to get a buck....it makes the process worse for those who are not looking to make their retirement...only a reimbursement much harder.
I have experience with an ex neighbor who sued anybody for anything if she had any chance. Needless to say, after learning this one night when she had had too much to drink at another neighbors house... I NEVER allowed her kids to play at my house and NEVER had them on my property. THe same thing happened with other neighbors as they found out. Everyone was waiting around to be sued for some reason or another. FINALLY the neighbors moved. It is sad but we are in a high end neighborhood and we all figured out how this family got here....through suing everyone....
People like the coffee lady (and my ex neighbor) among many others have totally screwed up the system.
Personally, I would contact the McD's where it happened and would possibly go one more step up. If I had no response...I would write it off.
Kids will be kids and things will happen, unfortuantely...some things that happen are worse than others. Hopefully your little one will recover well and this can be forgotten in time.
I know we have written things off before because it is not worth the time and money to pursue it.....bottom line is the HEALTH and SAFETY of your child. For us...our daughter is our priority vs ..... wasting more valuable time than necessary to be reimbursed.
Best wishes.