I was interrested in microchiping my 3 yorkies and talked to our vet and our county's animal control. I was told that we could have the dogs chipped but there was not a reader in the county to read the chips!!!!

They suggested tattooing the dogs for id. They did not even seem interrested in the whole idea.

Here we are, a lakeside community in an area with thousands of transient visitors many with dogs from all over the midwest and there's not a chip reader in the county to help identify your dog if it gets away from you. Scary thought. Check with your local animal control and vet to make sure there is a chip reader and what kind of chip reader available in your area before having your dog microchipped.
We have friends living aboard their boat in the Caribbean. Their dog, Chloe, is microchipped and they purchased a reader themselves to have with them as they travel.