After ending up in a backyard pond in Spokane Valley, a cow moose remained unable to get out for about five hours. Rescuers tried a number of approaches, including a ladder turned into a ramp that the animal would not use, before it finally made it back onto dry land. What happened? On Friday, firefighters in Spokane Valley, Washington, were called in after animal rescue volunteers asked for help, KXLY reported. The incident took place in a subu…