The ginger kitten, named after Game of Thrones character Tyrion Lannister, was believed to be the runt of the litter when she was brought into RSPCA care from a multi-cat household in St Helens in Merseyside last month.
However, vets now fear the palm-sized kitten actually has a condition called Portosystemic shunt. This is a bypass of the liver by the body’s circulatory system and is often hereditary in cats and dogs.
This means she will need surgery or poor Tyrion will continue suffering.
The RSPCA Macclesfield branch which has been looking after Tyrion and her littermates, Jaime, Cersei and Tywin Lannister, are desperate to raise funds for the surgery.
Maaria Cooper, cat rehoming co-ordinator at the branch said: “If the test confirms she has Portosystemic shunt then she would require surgery to resolve this. Without the surgery the outlook for Tyrion is very bleak.
“The referral to a specialist vets and the surgery is estimated to cost between £2,000 and £3,000. We need the public’s help more than ever.
“I am absolutely devastated. Tyrion is such a lovely little kitten and I really hope she will be able to get the care she needs and pull through.”
Tyrion has already had a rough start in life as the litter was taken in by the charity when their owner could no longer care for them and treated at Greater Manchester Animal Hospital.
At just eight weeks old they were brought into the branch on August 21. Staff at RSPCA Macclesfield decided to name them after the infamous family in GOT.
Tyrion is about half the size of the others in the litter because of her condition.
So far the branch has managed to raise £1,000 but more is needed to fund the vital surgery.
Maaria added: “We are going to do everything in our power to give Tyrion the best possible chance, if we can’t save her then any money raised will go towards helping other animals in our care.”
Show support for the Macclesfield branch by tweeting with the hashtag #SaveTyrion and donate here.