I've been walking a rescue dog for the last couple of months since the passing of my wife, for a local kennels. I do it for exercise, and to keep her father/my father-in-law company. Eric is a Great Dane - very big but fortunately very placid, and this is one of a set of caches that follow one of the main walks we do around Treeton Dyke.
You will pass 'The Swan Pool' on your left as you continue your walk - a smaller pond where there is often a pair of swans to be seen (as opposed to the 34 or so others on the main body of the Dyke), along with ducks, moorhens and the occasional heron.
Update 2025-11-19: Following the flooding you are now looking for a hanging black bison tube.
Update 2026-04-17: After a second muggling the bison tube is now a simple camo'd plastic tube
Update 2026-06-08: After a third muggling the cache has changed to an 'other' and is at a different height - see the new hint for details. Twezers will be required.