Derby, New York is a fun little town seated right in Eerie county. You will absolutely love that it is packed with things that you can do with your dog all year long. You can stay at one of the five pet-friendly hotels in the city. Take a walk through the town square, and don't forget to stop by town hall for a map of the area. They are super welcoming to new visitors and will gladly point to places of interest.
If you would like to go play on the beach, you can take your pup over to Bennett Beach and let them splash and play in the water. There are dog-specific beaches set up. You can go fishing or boating if you would like, too.
If you want something to do that isn't water-related, you could check out the Eighteen Mile Creek. Bring a leash and you can take your dog walking down the trails. You will see squirrels and rabbits all along the way. There is the creek to play in, but there are many other things to do as well. For instance, you could learn to track small animals or deer. Your pup will love all the new smells along the way. Don't forget to pack a picnic and some water.