At least where I live farm dogs are a sprint training method we use. I call them dog intervals.
On the serious side getting bitten just plain stinks.
About two years ago we had a guy show up at a training ride that no one knew. We were passing this farm and three dogs ran out and this guy hit one of the dogs at about 25 mph and went down hard. I had my cell phone with so it was a quick 911 call and we stayed with him until the paramedics showed up. A member of our team is a doctor and he determined that this guy had a broken collar bone. Like a typical cyclist the first thing out of his mouth after he hit the ground was, "Is my bike alright?"
Who went down? If it wasn't a college kid and he's still around, I probably know him, but haven't heard the story. I'm assuming Mike Ozment was the guy who helped?
Before a group ride this spring, I did some extra miles and got chased by a dog after an interval. I chose my route poorly, so in addition to being dead in the water, I was fighting a headwind, and the damn thing got me. Was coming back around for a second run at me but I kicked it in the face when it lunged for my leg. This was up on either High Cross or Cottonwood on my way back from Flatville. Then another dog gave chase as well a couple miles later, but I outran him. Not a good section to ride on, up there.