We rescued an 18 month old boy cat 3 weeks ago and have been having some behaviour problems and also tummy and runny poo issues since we got him. The poo is improving but the behaviour is not. The issue is he bites if we pick him up to remove from counter top/bedrooms/anywhere we don't want him and he also is very scratchy, often when playful which is obviously normal but he has also bitten and scratched when unprovoked. My children and both young and now petrified of him as he has scratched them both, we try to only do supervised interaction with him but he will jump on the sofa, scratch them and run off! He also has bitten my husband and I unprovoked, we have been sitting with him on our lap not stroking then he has turned and bitten. I think the issue is we feel we can't trust him with the children and maybe he just isn't happy in a busy noidy house. Is this something which may improve when he is allowed out or should we return him? The shelter have said to see how he is after the weekend and then return him if still biting. Don't want to feel we have given up on him but we are all so stressed by him and clearly he is not happy either.