Hello, Is your daughter having cough and cold symptoms everytime you feed her with milk? Are there any other symptoms such as irritability, vomiting, diarrhea, red rash on face when fed with milk? If none of the above happens, milk allergy is very unlikely. She definitely needs to have allergy tests done before you switch her to another milk preparation and allergy tests to other foods/aeroallergens to ensure we are not missing anything obvious. Please ensure her immunisations are up to date. Cough and colds at this age especially if she is going to the nursery is common as viral outbreaks occur at times of season change. Please also ensure she is seen by a paediatrician to ensure she is not having bronchial hyperrectivity or an asthma like episode when she gets the cough. Asthalin syrup will prove to be very useful in that situation. Thanks.