I have a Dachshund who thinks he is ten feet tall and bullet proof, and recent rescue, which is an unusually mild mannered Chihuahua. I have never met a non-barking Chihuahua until now. I'm sure the Dachshund will teach him in no time. I had about 15 cats years ago. They were all such big babies. I spoiled them good!
Mine have split personalities. And sharp claws.
And I make a point to spoil the doo doo out of them.