It doesnt appear that you have any damages (other than missing out on enjoying a beer). Therefore you do not have a viable claimContact the manufacturer for some free beer. Best of luck.
I am licensed in California, therefore, my answers are based on general prinicpals of law or California law, which may not be applicable in your jurisdiction. Answers posted to Avvo are for general information only. Do not conclusively rely on any information posted online when deciding what to do about your case. Every case depends is fact dependent, and responses are limited to and is based on the information you posted. No attorney-client relationship shall be created through the use reading of this response on Avvo. You should never delay seeking legal advice, disregard legal advice, or commence or discontinue any legal action because of information in this response.
You could pursue it with headquarters but be prepared for inaction of their part. Did he report this to restaurant? If not, then this would be a hard case to prove. Also, since your son did not swallow the slime he has no real injuries, which was confirmed by the hospital. They will probably argue that the slime was harmless, and without the actual slime it will be hard to prove what it was and where it came from. You will be lucky if they pay his medical bills.
DISCLAIMER: David J. McCormick is licensed to practice law in the State of Wisconsin and this answer is being provided for informational purposes only because the laws of your jurisdiction may differ. This answer based on general legal principles and is not intended for the purpose of providing specific legal advice or opinions. Under no circumstances does this answer constitute the establishment of an attorney-client relationship.
Based upon your question, it doesnt' sound like your son ingested the substance. Moreover, apart from going to the ER (for preventative measures I assume), it doesn't sound like your son suffered any negative consequences from this incident. If that is the case, you don't have any damages in this case, apart from the potential ER bill.
Since you don't have any major damages, most attorneys probably won't take the case. You could consult with a local attorney to see if they have a different opinion. However, I would suggest writing a letter to the restaurant. Complain to them that the beer had a "gross" foriegn substance in it and send along the picture to prove it. Tell them what you want and hopefully they will give it to you.
Attorney's answers to questions are for general purposes only and do not establish an attorney-client relationship.
Sign up to receive a 3-part series of useful information and advice about personal injury law.