Fergus is in the park telling stories to Sid and Big Fee when Dylan arrives trying to get Dolly to stop skateboarding so that she can return home and dust. Their meddling causes Dolly to fly off her skateboard which hits Fergus and injures him. The dalmatians take him back home where Delilah checks on him and reveals that it is a minor injury that he can easily recover from, but that he will need to stay inside. Fergus is against the idea, but realizing that he is incapable of standing on his paw is enough for him to agree. Fergus is forced to be given a bath which he ends up enjoying despite his prior feelings on it and furthermore becomes attached to the puppies; easily giving them orders that surprise Dylan and Dolly. Dylan decides to take the time to look at his fossil collection while Dolly becomes annoyed as her skateboard is being used as an arm rest while the wheels were removed and placed under the bathtub for Fergus.
Fergus begins taking over the house which concerns Dolly, but Dylan ignores as it gives him free time. Fergus continues to take advantage of the puppies by having them let him take over Dolly's bed and being given Doug and Delilah's anniversary bone. Delilah eventually tells Fergus that the swelling in his paw is healed and that he could easily return to the wild. As soon as she leaves however, Fergus puts the bandage back on and continues to abuse the dalmatians' hospitality. Dolly witness Fergus' paw all healed and confronts him with Dylan while they are playing Poodlewolf. Dylan refuses to believe that Fergus has done any wrongdoing until Pearl arrives asking about a series of recent thefts which Dylan realizes were caused by the younger dalmatians.
Dylan and Dolly confront Fergus over the recent events and he denies any involvement; even claiming that his paw still hurts. Dylan and Dolly then beckon him by asking how he performed a certain move when avoiding danger. This causes Fergus to get up and perform the move, showing that his paw has in fact healed. However, the puppies are more amused by this than actually offended and Dylan and Dolly remove them from the room. They tell Fergus that their hospitality has done a number on him as he is technically no longer wild. Fergus denies this until he realizes that he has become too fancy and flees the house. As Dylan and Dolly tuck their siblings in at night, Sid and Big Fee show up with bandages, but the dogs refuse to allow them in.
- Josh Brener as Dylan
- Michaela Dietz as Dolly
- Connor MacNeill as Fergus Fox
- Ella Kenion as Delilah
- Ben Bailey Smith as Sid the Squirrel
- Aimee-Ffion Edwards as Big Fee
- Tameka Empson as Pearl
- Nefeli Karakosta as Dizzy
- Florrie Wilkinson as Dee Dee
- Rhys Issac-Jones as Dawkins
- Abigail Zoe Lewis as Dallas
- Lauren Lindsay Donzis as Destiny and Déjà Vu
- Rocco Wright as the Dimitri Trio
- Bert Davis as Diesel
- Akiya Henry as Da Vinci
- Maxwell Apple as D.J.
- In "It's My Party", Destiny shows an intrigue in foxes. In this episode, Fergus is seen wearing Destiny's collar.
- The episode's title is a play on the idiom phrase "A Fox in the Henhouse", a term used to identify an individual whose actions could bring disaster.