I found a tick on my dog's ear Sunday when I bathed him. Funny thing is, we had just got home from the vet - the vet tech missed it, the vet missed it, I missed it when I cleaned his ears. After I removed him I used the HD blow dryer to get a good close look at the rest of his skin and I didn't find any others.
We treat our yard for fleas/ticks every year because I don't want the dogs bringing that stuff in. We were late in treating this year (obviously). We got that chore done Sunday evening.
BTW - an easy way to both remove and KILL ticks. Use a cotton ball to soak up rubbing alcohol. Hold the cotton ball over the tick (make sure you cover the head). After about 30 seconds if he doesn't pull his head out on his own, it will be easy to tweeze him off. After that, drop him in alcohol (enough to cover him completely).