CATSA clearly lays out the rules for travelling with breast milk, just as the TSA does in the US. $10 says this person didn't bother to read the rules. You have to be travelling with the infant to carry on breast milk in Canada and they limit it to what can fit in a 1l bag in 100ml bottles. Otherwise you can just put it in your checked baggage and avoid any hassle. I personally think the rule is a little stupid, but I sympathize with the security people since they don't have any say on the rules. They just have to enforce them. I can relate. I sometimes slack off on being really strict with the rules at work that I think are silly and it almost always comes back to bite me in the butt.
Also, I travel a LOT between the US and Canada and I get so sick of being in the security line behind people who refuse to read the rules before they travel and then waste all of our time arguing with the security folks. I've seen countless people argue about their bottle of water or the perfume they bought or the hair products they want to bring with them. They ALWAYS have the option of putting them with their checked baggage. Call the airline before you travel if you're confused about the rules. Don't think the airport security people will make an exception for you because you aren't special as far as they're concerned. I go home to Canada from LA at least 3 times a year and take 2 or 3 other flights within the US. I've never had a problem getting on a plane because I learn what the rules are before I fly. I did have to throw out some stuff when I flew the day after the new liquid rules went into effect, but I accepted that since I really should have checked into things that morning.
