Thanks for the replies. Christine, when you say they check all of the cans, do you mean they open each one?

I've printed the TSA rules, a TSA notification card and am getting a letter from his doctor.

Tim waited until the last minute (no surprise ) so he's going to check the rest of the food. American Airlines may let the bag fly free if it only contains medically required formula. He's leaving from a small regional airport where the airline and TSA reps tend to be nice; they never know who's friends with their mom on Facebook!

Susan