text: An elderly widow has been left distraught after her pet dog suffered third degree burns following a routine operation. Marina Lyons, 80, took her beloved dog Rosie to the PDSA PetAid Hospital in Hull for an operation to remove her spleen after a scan detected a tumour. The operation, carried out three weeks ago, was successful but when Marina returned home with the ten-year-old Lhasa Apso dog, she noticed lots of bruising on the its back. Marina Lyons, 80, discovered third degree burns on her dog Rosie's back after taking the Lhasa Apso for surgery to remove her spleen due to a suspected tumour . When Ms Lyons discovered bruising on the dog's back she asked the vet about it, who told her it was from the operation. Not satisfied, she took the dog for a second opinion, when the burns were discovered . Marina said: 'After we discovered the bruising we rang the PDSA and they advised us to bring Rosie in for them to have a look at her. 'The vet told us they had put her on a heat pad to aid her recovery, which had led to a burn on her side. They said the bruising was from the operation. 'They then told us they didn't need to see Rosie for another four weeks.' Not satisfied with the first vet's explanation, Mrs Lyons took Rosie to Vets4Pets in Anlaby for a second opinion. Marina said: 'The vet there was shocked. He wanted to see the extent of her bruising and decided to shave Rosie's hair on her back. 'It was when he shaved her hair he discovered third degree burns on her back. We were horrified.' Rosie had to have treatment to remove dead skin from the burn, and is expected to have a skin graft. It is thought the injuries were caused by a heat blanket used during her recovery from spleen surgery . Rosie had a further operation on Tuesday to remove the dead skin tissue from the burn. A skin graft is also planned for next week. Marina said: 'When you take a sick dog to the vets you do expect the operation to be a success, which it has, but you do not expect the dog to end up like this.' A PDSA spokeswoman confirmed they had received a complaint regarding Rosie's treatment. She said: 'We take all complaints of this nature very seriously and have launched a full investigation. 'While we cannot discuss individual cases due to client confidentiality, we will be in direct contact with Mrs Lyons during the investigation.'
target: Marina Lyons, 80, took pet dog Rosie for operation to remove her spleen .
  After successful surgery noticed dark bruising along the dog's back .
  Was told damage was from surgery, but took pet for a second opinion .
  Second vet discovered burns, and had to operate to remove dead skin .
  WARNING GRAPHIC CONTENT .