When I was learning to whip-in I would watch the huntsman and the way he effortlessly walked his pack out in the spring and summer. This particular spring the swallows had arrived early and would flit low across the fields in front of hounds. To my surprise he let his hounds chase them.
Keen to learn, I asked why he did not want me to turn hounds back. He said that this was their time off, and he wanted them to relax and unwind.
A few months later we were out for our first early morning cubhunting. Hounds were held up for a few minutes at the meet and then we move off across a huge stubble field toward our first draw. Huntsman and hounds were halfway across the field when out of nowhere came several swallows flitting down and in front of hounds!