Also, if he is having a particularly bad day, you can give him children's liquid benedryl . It will relieve the itching and watering eyes. Like patti said, Layla also has seasonal allergies but because we get snow here in the winter they are just summer/spring. Allergies are TOUGH. it's hard to know what it is but if youc an get rid of the usual suspects it might help. I was lucky and we found out through elimination but you may have to go for allergy testing. Layla is also allergic to milk products so if he gets yogurt or whateer you might want to cut that out of his diet as well. Hang in there
it's very hard but there are many going through it with you!