Yep, half and half, from what we were told. But we didn't see his parents and I see very little Pom in him. He is trying real hard to grow an impressive Pom tail, but it isn't happenin'. LOL. He has a Pom face, and the beginnings of a ruff around his neck, but I see mostly Chihuahua in him. Poms are wonderful little dogs, we had a purebred black Pom years ago.
And yes, they can be yappy. Chachi has started barking more and more, and that's one thing we need to start breaking him of. It's a high pitched hysterical bark that will just drive you up the wall. We're NOT rural and I'm sure the neighbors don't want to be listening to him barking every time he hears a sound on the other side of the fence. LOL.
I recall my parents dogs bark being annoying. But we weren't here that often. Lived out of town so it was a few days here & there a year.. do you have a full view standing of chachi?