Aw, I am sorry your babies are itching and matting up now.
I don't have any idea what it could be.
Could they be allergic to an ingredient in one of the products?
Last year I gave my yorkie Scampers a bath using Minksheen as I wanted to give it a try. His hair was so long and beautiful.
Right after I used it he started scratching. His hair became dull, broken and matted. He was so itchy and was just making it worse. I had to take him to the groomer and get all his hair cut off and the treated him with a good moisturizing shampoo and conditioner and the vet gave him some allergy medicine;after that he was all better. He was allergic to something in the shampoo.
I hope you can figure out the cause of it. After you work so hard to get their hair long and beautiful and then something like this happens that ruins all of your hard work.