I have a pug with a wrinkly, short muzzled face. 
Aww, sounds cute. I have 2 dogs but neither a pug
Do you have a toy Spaniel? They have been in Europe since the 16th century. 
No, I have a boxer/lab mix and a chihuahua/yorkie mix.
My sister has a yorkshire terrier which were bred to kill rats
My little dog has caught a couple field mice
Thats like rat-baiting, an old sport where rats were thrown into a pit with terriers
hmm sounds a bit cruel. I know there is a rat hunting club in New York where they have a team of about 10 dogs that go through alleys