Is Chico a chihuahua? Leaving a dog alone for hours (more than
may be making Chico 'not active and happy" as when you were in the states. Yes I think another dog would make Chico not so alone. Another chihuahua is good. Chihuahua's like other chihuahuas! If Chico is not a chihuahua, make sure they are close in size. I know there are very successful adoptions of bigger dogs, but you really have to be careful. Let us know!