Just had another thought. I have helped a friend who runs a small dog rescue with fostering, and one of the dogs I fostered was a Chi. As I mentioned, they are what set off my allergies when I was a kid. What I found was that when he first arrived his coat was harsh and dry (he had been on a very poor food), and whenever he touched my skin, I would break out in hives. (Difficult since the poor baby wanted to sleep under the covers next to my bare legs...I'm a bit of a glutton for punishment
) But after a few weeks of a better food, his coat became softer, and he certainly caused less reaction when he touched me (and I took to wearing pajama bottoms). So, not that this is the case with your dogs, but keep in mind that dogs will "throw" allergens based on what their diet/grooming/skin is also like.