A.G.
I would have him tested. My daughter has similar symptoms as well as lack of growth. I had her tested with the skin test and she came up mildly allergic to milk. However, when we did a full elimination diet (meaning no milk or milk ingredients in anything) she really did not have much change. Her stool did solidify to the point of painful constipation, but her eye circles didn't get much better. The extremely limited diet did cause her to lose weight. Her nutritionist advised that if her reaction was so mild we should continue to include milk in her diet since the main symptom was lack of weight gain and if she loses weight we are going backwards. We did also have the RAST bloodtest to confirm a milk reaction since false positives are possible on either test.