Chrissy Teigen's dog has heart failure.

Chrissy Teigen and John Legend

Chrissy Teigen and John Legend

The 31-year-old model had to rush her bulldog Puddy to the emergency vets last night (12.11.17) after her pet pooch was struck down with a mystery illness.

She tweeted: "At the emergency vet with my old man bulldog puddy. Please send him happy doggy thoughts :( my first born baby (sic)"

Chrissy later told her fans of Puddy's condition and admitted she was going to have a sleepless night worrying about her canine companion.

She wrote: "Heart failure but he is stable at the moment. not sleeping tonight that's for sure. Thank you (sic)"

One of Chrissy's fans admitted they were going through a similar experience with their dog Grimble and having to say goodbye to the pooch.

She replied: "I'm so sorry. Sending love to Grimble :( (sic)"

Puddy's illness comes two and a half years after he married Chrissy and John's other bulldog Pippa.

John and Chrissy - who have 18-month-old daughter Luna - sprinkled rose petals down the aisle for the happy canine couple and even fed them their first piece of wedding cake on their big day.

The pets were appropriately dressed for the occasion in suit and bow tie and a bridal gown, and they found time to take some snaps with their owner-turned-wedding singer in a photobooth at their mutt marriage.

John even officiated the wedding for the pooch pair who looked to be thoroughly enjoying their canine ceremony.

The 'All Of Me' hitmaker put on the dogs' big day to help promote an initiative for his charity, The Show Me Campaign, which aims to give impoverished kids a great education.