Welcome to the flock. You are off to a great start. I think you've done well, being given chickens with no previous knowledge and not having a setup. After all, you found us! Now that you're here, do take advantage of the advice, and properly cover the run with wire on top and around. Check out the coop pages for plans, or with just two, you might consider a prefab coop, but know that all prefabs are not equal, and even the best ones need some tweaking to make them secure. Meanwhile, I think if you raise that dog house on stilts, they may be more inclined to use it. Chickens like to roost on the highest place.