Hi.......Im just a beginner but Michio Kushi says in 'Natural Healing through Macrobiotics' that asthma is a Yin condition.......that would be the apple juice I suppose- quite YIN......... maybe try heating it with a pinch of salt if you don't want to remove it from the diet...also making sure the rice is 50% of the food & the veg is less than 30% maybe??.......
Too many vegetables & not enough grains aggravate Yin conditions. You can make the vegetables less Yin by cooking them for longer......with a SMALL amount of water.........
Its very difficult to feed a baby macrobiotically because part of deciding what to eat each day will be using your own judgement. Eg if you crave meat one day......you probably have been having too much fruit, desserts, salads, water in the diet........
But because the baby cannot tell you what he or she is feeling yet.....it will be rather difficult to get it right..........
It also may be worth checking if he is allergic to something in particular.....eg a soap, dust, pollen, fur, clothing, bedding, pets, chemicals.
Hope this helps........im a beginner so it may be worth getting a macrobiotic counsellor to help you organise the babys diet......especially one with kids!!
Michelle