Some woman at target just now just asked how old my daughter is I said "22 months" she replies "wow…

Some woman at target just now just asked how old my daughter is I said "22 months" she replies "wow she's so little for her age, do you feed her?" Now usually I ignore ignorance but I just blew up on her and told her "actually she eats very well. She's a preemie and fights every day to catch up to her age. And for her being a preemie she's actually ahead of her actual age in some areas developmental wise" and then I continues "although she be like she is fierce" her husband quickly apologized for her rude comment and the woman just stood shut. From one mom to another mom I was just baffled at that comment she made.