As stated before, in PA you can get a lifetime license. The dogs have to either be tattoo'd or microchipped as a means of permanent identification. I think the price is around $50 for an intact animal, $30 for a sterilized animal, and they also give further discount to seniors. It's been a long time since I bought an individual tag, but I think they are around $6 for an altered animal. The rabies is not tied to rabies in any way in PA. Two totally separate things. The owner can be traced through the state records if the dog is picked up as a stray.