I'm a worrier, and I like to be prepared, so this is the stuff I got for Bella when we went on vacation, and I knew we were going to be in the sun a lot:
Doggles Pet Sunscreen
I didn't end up using it because we were able to stay in the shade...and in all honesty, she probably didn't need it anyway, but it made me feel better that I had it just in case!!
When I got back from our trip, I gave it to the lady with the Chinese Crested because I figure she WOULD be able to use it! It's made by Doggles, and it can even be used on noses! Pink noses burn too...who knew?!! That won't apply to us because our babies have black noses, but you could spritz down his little back if you're going to be in the sun for more than 30 min.