Hi, I'm Mike and have a 3 and a half year old female
Rottweiler-(hound) mix named Callie. I adopted her when she was 10
months old and she was a pretty nervous dog then also.

Her tail is often down between her legs when I walk her (I think she's
after a squirrel or bird). She freaks out when I kill a bug, hammer a
nail, vacuum, etc. She paces a lot, usually around the coffee table
and in the car though I don't think she's "afraid" of anything, and is
generally really high strung. I'm trying to re-train her to go to her
crate to may be help ease her anxiety but for some reason, she freaks
out pretty bad when I try to get her in.

I think there might a few things that could be affecting her. I
adopted her in Leesburg, Va (rural area) and was living in a
Washington D.C. suburb. A year and a half after I adopted her, I
moved to where I live presently in the city of Pittsburgh. I've never
taken her to obedience school, which I think I'm going to try, and am
also thinking of adopting another dog to help calm her down- an older
male dog. A friend of mine suggested that and she told me that it's
working out well.

Anyone have any suggestions? (Sorry about the long post)