So my dog recently has been scratching a lot (in the past month or so). The past couple days I've noticed a couple spots that the fur seems to be falling off of. Nothing extreme. There's a one inch diameter aprox. patch on a leg, and the tip of her ear (just along the edges). I was reading about dog mange, and at first I was worried that was what it was, but I read some more about the different kinds and it all seemed way more extreme than this. We also have another dog and cat and neither are itchy. Could it be a diet thing or allergies? Or should we get her checked for mange?