Good job Boo Boo came to you when he did. There's so much good information and experience from people here and I can't add to it cos I tend to ask questions when needed co sof the experience of people here. At least he is safe now and free from those dreadful ignorant previous owners who sound like are not worth dealing with. Although I'm here no with Minstrel's good news I've not been so lucky in the past and lost 3 cats who didn't make it despite my efforts. They too had a rough start in life but the one thing I am sure of is that every second of love and care they got from me made their lives a lot better and helped give them the comfort and safety they needed to cope with arising sickness issues. Giving them tlc and safety along with whatever medical care is appropriate is the biggest gift they can have. As someone said it maybe flea anaemia and nutrition etc could make a huge difference. Previous owners hadn't got a clue about the cats health needs so I doubt they cared about nutrition needs. He will know he is loved and safe and that will make a huge difference to how he feels in himself xxx Michelle, Minstrel, Angel Buddy & Angel Bramble PS - sending prayers and strength to those who have recently lost a furbaby as I noticed a couple of posts about angel furbabies - they will be restored to health and snuggling up keeping our soft fluffy cushions warm until we get there xxx