Cougar in the yard?

The back of our house leads to beautiful wheat fields. Even when cut down and harvested for the year it still looks amazing. We'll the other day we saw something run in the field. It looked just like a cougar. We watched it for about 20 minutes. But then it got closer and realized it was just a dog! Fewf. I know we are in cougar county but a real cougar in our backyard is pretty scary!