We have a kitten, she is 15 weeks old and we have had her for 2 weeks, during which time she has used the litter tray with no problems at all. She sleeps in the dining room at night with our older cat. This morning I found that she had done a poo next to the litter tray during the night, I thought maybe big cat had done a wee in the tray in the night and that had put her off using it. It's a tray with a cover so it's not like she was in the tray and 'missed'. I cleaned out the tray and replaced the litter, went out this afternoon and left kitten in the dining room on her own (this is so that she does not destroy the xmas tree or escape from the house when DH leaves the front door open), again she has pooed next to the litter tray (with a wee inside), so what the hell is her issue?