On Hearth's Warming Eve, Cogs gets the biggest surprise and the best present ever when Twilight Sparkle pays him and his family an unexpected visit.

This is a Christmas/Hearth's Warming special one-shot that takes place a few years after Cogs met Lavender, early during the Growing Up Dandy story.

This story is a sequel to Change of Life

Hearth's Warming is a time for family to come together to celebrate, but can Whirring Cogs accept one relative in particular when she comes to visit?

This is a stand-alone short story that is a sequel to the events of Change Of Life and the Chrysalis Resurgent series. Knowledge of the events in those stories is necessary to understand fully what is happening in this one.

This story is a sequel to Change of Life

Dandelion is a pegasus filly, Cogs and Lavender's firstborn daughter, and a joy to them both. As a changeling though, Cogs had no experience with raising pony foals, so when a crisis arises, he often has to wing it. Sometimes the solutions are more creative than others, and sometimes the problems are unique. After all, how many fillies have a changeling parent?

This is a series of stories that are sequels to "Change of Life" and takes up after chapter 10 (Foals).

Zevan was a loyal changeling and always did his queen's bidding, although he quietly questioned why changelings should end centuries of secret but peaceful intermingling with the pony population. After being expelled from Canterlot by the irresistible force of love and badly injured after crash-landing in trees, he had to reconsider his future. Ponies knew that changelings existed now, and the only example of them was Chrysalis' attempt to overthrow Celestia and their attack on Canterlot's population. His kind would be pariahs for the foreseeable future and maybe even their disguises would not keep them safe. A unicorn mare with a broken horn might do the trick though.

There is now a prequel to this story - Prelude To Change I suggest that you read that first.

Whirring Cogs had a happy and near ideal life as a mechanic at the Cloudsdale weather factory. He had his best friend, a good social life, a job that he loved, and time to take joy in flying. While he enjoyed socializing with mares, he had no interest in complicating his life with a relationship, and lived contentedly as a single stallion. Then a mad changeling queen dared to make plans to wrest control of Equestria from the alicorn princesses. It's a pity that she was his queen, and Cogs the changeling had his perfect life ruined.

This is a prequel to my story - "Change of Life" - and explores the events that led up to the beginning of that story, before his fateful encounter with Lavender Dreams.