About a month ago my 2 year old Great Dane decided she didn't like going on walks anymore. She only goes outside to use the bathroom but will not go any farther, and after she is done doing her business she makes a beeline to come inside. I have lived in the same apartment complex since October 2007 when she was adopted into my home. She has been to the vet and all blood work is normal, thyroid is normal, no muscle problems, joint problems, etc. I started her on anti-anxiety medicine, per vet recommendation, about 5 days ago to help with her severe anxiety in general. She was very undersocialized prior to her adoption. There is nothing I can think of that would have made her all of a sudden upset about going outside, other than the fact that it is summer and I started leaving my windows open more, and maybe she is hearing sounds during the day while I am away. Does anyone have any advice they could offer me? I miss taking my dog on a walk, but she shows no interest in going. She'll go a few steps before her eyes get dilated, her tail is between her legs and she begins to drool and back away from me. I always use positive reinforcement, as I know this breed is quite sensitive. Any advice would be very helpful... thank you!