Make sure your vet runds a 3dx or 4dx hw test on your dog. 3dx tests for lyme and erhlichia. 4dx also tests for anaplasmosis. Those are all tick borne dz. I don't know how commom lyme is around cal. I know back east is a real issue. around here we see very little. We do see alot of erlichia though. I have seen rocky mountain spotted fever twice. Frontline is a good choice and kill ticks w/ about 12-24 hours which will prevent dz from spreading from tick to your dog. Pet armour has the same active ingediant, but not the same carrier as frontline. It will like work well, but they are not spending any money testing it. So i can't say for sure it will protect like frontline.
2013 totals
Stands 60
Yotes called in 39
yotes killed 27
bobcats 0