I have used Spangler Animal Clinic on N. Lamar across from DPS for many years and a couple of dogs and cats. I now live about 20 miles away but still go there because they're very good and they care about you and your pet(s).
I ended up going to Balcones Animal Hospital. I found out they did a lot of work with Austin Boxer rescue and Dr Woods is an Aggie so that made me feel good.
Dr. Weaver at Hometown Animal Care in Pflugerville is also an Aggie and he's who I got to. It's also within a couple of miles from my house. Dr. Mendoza is also easy on the eyes if you see her.