One of the yards we mow is home to a really sweet laid back dog. She will just lay still on the deck while I mow right by her and always gets a petting session sometime while we are there. She seems to know when I am going to stop and play, often getting up as soon as I decide to take a dog break, but have not given her any sign that I am aware of. I have also seen her perk up and go toward the driveway a few minutes before her owner comes home. He told me that he is not on any regular schedule, but that animal seems to know he is approaching long before she could possibly hear his car, especially with my noise going on. I would like to do some serious research on this with some better controls.
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