Ear infections are caused:
A When a child is exposed to cold temperatures
B By going outside with wet hair in winter
C By fluid being trapped in the middle ear
D By a virus

Your dog can sniff at or even eat a bit of catnip. the herb is edible and not harmful. just don't expect them to roll around like a cat would! your dog may scrutinize catnip by licking and smelling at it, or be totally indifferent to this stimulant.