So Lexi has just had a big runny poo on my living room carpet. And I saw some huge worms in it. What sort of worm is this? The previous owner said that she was wormed and flea treated. I've given some supermarket worming treatment that I have in the house. It's for use on cats over 1kg. I weighed her and she is over 1kg. Poor baby. I'll hopefully take her to the vets tomorrow. They are all closed now though. I've seperated her and Links. She is in the bathroom on her own and away from anyone else.