Zoeconner you will likely have a full pond by spring, and that is all you really need to figure on. The snow/rain runnoff from winter/spring will do it for sure, that how we roll up north. It's too late in the year to get any spawning out of them but You could add some fathead minnows anytime so they would be ready to spawn in the spring. Or you could get them in the spring, it all depends on what your goals are for this pond. More info is required on all sides, do tell?