The incident is so vivid in my memory, I didn't think to explain how it happened or that it wouldn't be apparent to my readers. Rachel pointed this out, so let me clarify:
Cassidy, a 50 lb. mutt with what I think must be some terrier in her, got into the sheep pasture that is spitting distance from our home. She went into the barn, thru the screen door that is not attached to the doorway - it's propped up against the opening - and down the ramp. It had been a windy day and I had forgotten that the door wasn't attached to the doorway.
Cass chased the sheep, and the sheep ran into the pond to get away. The first row boat I hopped in quickly took on water, so I dragged out the second one, which delayed the possible rescue. The two of them swam around until the sheep very quickly became exhausted.
It's the thrill of the chase for Cass. And sheep aren't very smart. We didn't have this problem with the cattle or horses on the ranch.
My home, the sheep, the pasture, the pond, the barn, and the leaky rowboat are owned by my employer. You can imagine the pluses and minuses of those details. The Boss is away, but the under-bosses know; burying a sheep carcass is not a one person job.
Is the story clearer?