I'll bet small breeds end up smelling better. Ever try giving a 70lb dog a bath? We've got two that size and I've taken to filling up the kiddie pool in the backyard rather than flood the bathroom. On the other hand I can dunk my chihuahuas in the sink and all I get is a concerned look.
What I'm getting at is that small dogs are easier to bathe, thus get baths more often. They also don't leave giant landmines in the backyard like larger dogs. Less in, less out. ;f
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