Whenever you have a situation such as this, it is always helpful to know what you want to happen before you place the call. I believe you should have been compensated for the mishap, unfortunately, Subway could not afford to accept responsiblity for the feathers out of fear you would sue them.

You should have asked for contact information for the distributor, so that you could make a complaint with them. It’s likely they will never know there was a problem. You should have demanded that Subway at the very least refund the money you paid for the sandwich.

As for the Health Department, unless you are familiar with their internal departments, it can be a nightmare to navigate their system to log a complaint. I found a link that might be helpful to you, while it is supposed to be used to report food poisoning, I do believe this would fall under that catagory.

Best wishes, I hope you are able to resolve this problem.