I'm fostering a big ginger boy for 6 months for someone who can't have him for a while due to housing situation... he's lovely and cuddly , neutered . I want to keep him in for a few weeks obviously but he's normally a very outdoor cat and not used to a litter tray. I've put one by the back door but he hasn't used it yet .. got him yesterday afternoon ... he hasn't had a wee or a poo at all .. any advice ?