I used to take my two working Spaniels on the bike. Was some dreadful fights for the best spot on the saddle… BaDaBoom. Tish….
They used to pull me for the first four or five miles as long as it it was not too steep a gradient. Extending lead and a “Y” length of chain on the end.After that they would settle into a gait that would just eat up the miles. As long as it was not too hot, this really is the pivotal thing, they would run me into the ground.
Get home and after an drink and something to eat, god help me if I picked up a jacket.
Its important to give them something like Digestive biscuits during a long day out to keep their blood sugar up.