Keep in mind that the AKC is looking at allowing mixed breeds to compete in the performance events. This may come to pass in the near future. I'm hoping so. I, personally, don't see any problems with ILPing your dog. The idea is that if your dog is a rescue, you really don't know the parentage. So, feel free to ILP. However, if you DO know your dog's parents and know for sure it's a mix, then there are some ethical issues getting the ILP.