I have a 2 year old male named Maverick and lately he has been really ichy. Nothing has really changed but the weather here in Kansas. I have him on frontline, taken him to the vet ( nothing fround wrong like fleas or skin issue). It has recently just started in the last two months. I have him on fish oil pills which he has been on for over a year. I did change food about 6 months ago from, Merrick to Pinnical Peak, but the iching just started in the last two months. I guess I should add that he is only iching behind his front legs and on his back. And when you rub or even touch his back his back legs go crazy like your touching his "tickle spot" Any advice or ideas?