The highlight of the local canine community calendar will take place on Saturday and Sunday between 12pm and 5pm.
Organized by The Parks Trust, the event is now in its 12th year and activities include a dog show organized by MK Vets Group, with fun categories such as Best Dressed Dog, Best Biscuit Catcher and Rehomed Rovers.
There will also be K9 Quackers Duck and Sheepdog Display, which is a favorite with audiences of all ages, and entertainment from the Paws For Thought Dog Display team.
Talented pets will demonstrate their agility and intelligence in races, tricks and games that will help owners better understand the fun of training their pets.
For water-loving dogs, there will be K9 Aquasport, where pets can try dock diving or dock jumping.
This year, Big Doggie Do attracted more than 30 leading dog-related treat vendors, including Butternut Box, maker of hand-cooked dog treats, and Rachel Baker, pet portrait artist.
Martin Chesse of The Parks Trust said: “The Big Doggie Do is back with a bark! I am delighted with our busy program of activities and our wide range of suppliers.
“Last year’s visitors told us that they really enjoy discovering the latest useful gadgets for dogs or special gifts to pamper their precious pets. We look forward to welcoming a large crowd to the event and see a lot of tails wagging at Willen Lake.”
For more details, visit the Parks Trust website here.