Somers on 12/9/12

We live in Somers near Hall Hill Rd. Sunday night I was letting our dog out in the yard and saw in the bushes about 20' from me a large "cat-like" animal. It was about 75-85 pounds. It looked at me and our dog, I picked up the dog, looked back over at the animal, and it ran off into the front yard. I didn't see it again. The animal was long, very lean, and I couldn't quite make out the color because it was very dark outside and the animal was dark but there was some white on the tail and on the face. I don't quite know what kind of animal it was but I've seen bobcats in the yard a few times and this thing was MUCH larger. Can anyone help me with this?