I doubt they are truly warped. People incorrectly toss that word around.
The vibration could be a number of things but often its just deposits that build on the surface over time. I see this a lot as I am not easy on the brakes but I try to remember every now and then to really warm them up through a few hard stops. This gets them to temp to scrape off the material *if* the build up is not bad. If its bad, turning the rotors a few thousands of an inch will scrape it off.
Find a safe place and do a series of accelerations and full on hard stops starting at 40mph and building to 60. 8-10 cycles should be good.
This has worked a few times for me. The only time I have truly needed to replace rotors is when I wore them over 50K+ miles and very hard brake pads (Hawk HPs) and they were less then the specified minimum thickness.
Stoptech has a few good articles on this, check them out.
- b
ps: adorable pup...what breed?