Start by measuring the pumpkin into a mixing bowl, and crack two eggs, mixing them together until the mixture is smooth. Add in the salt and the milk, and then carefully mix in the rice flour a little bit at a time. It clumps together fairly quickly, so you'll need to use your fingers to knead it all together. Everything should look really dry, but knead all the lumps out until it becomes smooth. Roll out the dough and, using your dog's favorite cookie cutter (in our case, a bone shaped design we found at Joann Fabrics), cut the shapes until there is no more dough left. Place each shape onto a greased cookie sheet. If you want, you can make additional designs on them with a fork. Place them in your oven: preheated to 350°F After 20 minutes, take them out to flip them over, then place them back in for another 20 minutes, or until they are a nice shade of golden brown.