I finally arrived at an answer that satisfied my curiosity, though it is purely conjecture: As dogs became more domesticated and changed by human intervention in the breeding process, they became more like us. They have become susceptible to the elements as we are. Dogs and humans have also developed ways of communicating with one another.  I look forward to the day when a dog can dress itself and ask me to fetch its bone. So, my birthday was last week.  I had wanted a dog forever, and my boyfriend surprised me.  He took me to a lady who had about ten tiny little puppies up for adoption.  My boyfriend was great; he knew I wanted a little dog.  My mom had always had little dogs.  We’re dog people and I had wanted a dog forever.  We couldn’t have one for the longest time because our roommate didn’t want dogs.  So, I picked out my puppy.  I couldn’t decide for the longest time.  I settled on a little grey and black pug.  I named her Spazz because she was super hyper from the moment I got her.  Overall, getting Spazz was a wonderful experience.  (Even when my boyfriend put his foot down that I couldn’t get her any clothes for dogs.  I did end up getting Spazzy a sweater, though.  She gets cold when we walk outside n the winter.)  I recommend dog companionship to anyone who is positive on animals!