A man has revealed how his mother was left devastated after being sold a poorly puppy which died just days after being picked up by them.
The woman who sold the mother and son the ill dog has now been suspended from the website.
Matthew Reid helped his mum Linda pick out a cocker spaniel from the Pets4Homes website, and the dog's mystery illness was not disclosed to them.
After selecting the dog, the pair then did an hour long journey - travelling from Barrow to Lancaster - to pick up Jett.
On the car ride home, everything with the puppy seemed fine.
But days after they got Jett to his new home, they noticed a sudden change in his behaviour.
Within three days, the puppy was quite sick. Initially the mother and son changed his diet, but when this did not help, they took him to the vet.
Despite two days of trying to save his life, the dog sadly died just five days after being relocated to his new home.
A spokesman Pets4Homes, which lists adverts for people selling dogs, cats, and other pets, said: “We can confirm that the seller has been suspended from our platform and have urged Matthew to notify Police and Trading Standards about his mother’s experience so that a formal investigation is triggered and we are then legally permitted to share all of our documentation on this case with the authorities.
"In anticipation of being able to cooperate with the authorities on this matter, it would be inappropriate for us to provide further comment.”
The spokesman went on to claim that only 0.4 per cent of dealings with customers have to go through its safety team, adding: “As the UK's largest platform of its type, helping 2,500 pets find safe and happy homes each day, Pets4Homes has a commitment to ensuring the safe rehoming of animals."
"At present, only 0.4% of pet re-homings require a subsequent discussion with our trust and safety team, and only a proportion of these are concerns that warrant further action.
"However, one rogue seller attempting to exploit our platform - and the good intentions of our users - is one too many."