Dried cat food should be alright (as long as there is always water available). Sometimes there is the occasional runny poo around. If it’s a one off it might not be anything to worry about, but if it continues, you might want to speak to a carer/rehabilitator and take their advice. You can give more details than is possible on the Forum. You can get contact details of your nearest ones by ringing the number at bottom left of this page under ‘contact us’.