Apparently lost dog seen a couple of times on River Rd S. on July 25

We’ve seen a large brown dog, sort of looks like a Rottie, wandering around in the brush on River Road S., about two and a half miles from Route 5. We saw it three times today (Tuesday, July 25), and have tried to approach it with cheese, but it’s not coming to us. We think it has a collar on. If you know who this dog belongs to, please contact Sue, cell 413-535-6866, and we can tell you more precisely where we saw it.