First of all, yes, there are a lot of people who are experimenting on a lot of things to try to address problems they have with their pets, some of which are ticks, fleas, and parasites as well as dry coat. We strongly advise against this practice. First, your dogs are very sensitive to allergens especially those products that are used directly on their coat and skin, which in this case is a dishwashing soap used to replace dog shampoo. While I can’t argue that some dogs do have softer and shinier coat after using it on them, however, these products have chemicals that are not good for your dog's health. Second, over time it can develop to underlying health problems that may eventually take a serious turn. There is really not much of a difference in terms of price and value of buying a dishwashing liquid and a dog shampoo. With buying the right product for your pets you are sure to get the same or even better results without compromising your dog's health.