hi there , my patterdale bitch is itching and losing hair in patches on her back and neck , shes had a dose of ivormectin and various mange treatment so mange is out of the question, my uncle said it might be allergies to food , or even to other dogs (shes with my dads labrador -_- ) i dont know what to do anymore she looks a state and it's F@%&£NG annoying me now someone help , cheers Iwan.