Yeah, the answer I got when I complained about all that random activity with two Australian Shepherds was "Well, they have to use up energy by herding sheep."
'Cept we didn't have no sheep.
But there was a lady nearby who had a bunch of Llamas and would let people run their shepherds (all kinds) on the Llamas and after watching several episodes of this, the discerning eye (mine) could tell the Llamas were actually training the dogs how to herd. Fun for all !
Anyhow, glad your pup is OK. I was surprised you didn't mention the problem I had with labs... their thwappy tails, which would knock things off coffee tables and the like and pummel other small critters like two year old kids. FYI JIC, both chocolate and grapes are poisonous to dogs. Like poinsettias are poisonous to cats.
For a Noo Yawk City boy, I sure learned a lot about no-, two-, four-, six-, and eight-legged critters after we moved out to Colorado.