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					Originally Posted by gemy  I really should look at the book first before I answer, but what I remember is that it has to do with lack of moisture in the air, from heating or air conditioning.  I do notice that Razz gets more static in the winter months when our heat is on.   Actually all our dogs do.  Don't notice it so much in summer time, but then we rarely have the A/C on.
 I thought leather ear comes from ears that aren't properly dried out.  I know I spend a good bit of time making sure Razz's ears are dried and cleaned every time I wash him.  But he is easy as his ears stand up, you don't want to know what I have to do for my drop eared BRT;s to get and keep ear health.
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  some say leather ear comes from moisture but I have found it so common with their environment being cold.  I had one that came from a home that the kennel was in a room with a window unit that kept the room very chilly and both bitches had leather ear and when I got one home with me in my warmer environment it got better but not completely and when Radar went with his handler and he was in her motorhome which was kept very cool he started developing it and thank goodness he came home before it took hold.  Every time I see it, it's because of the cold environment.