The indoor cat spends more of her time eating and sleeping than taking any form of exercise she therefore has only moderate energy requirements the lack of exercise leads to a slower intestinal transit this phenomenon can cause intestinal disorders and result in soft smelly faeces left in the litter tray your pet spends 3 to 4 hours per day grooming during she tends to swallow their hair this can form hairballs in the stomach and intestines which are difficult to dislodge if there is no ac