Hello fellow cat people. So, our kittens are 6 weeks old. It seems like they are all using the litter box, except one little bugger keeps pooping in the corner of the bedroom, but only at night! There are never any "accidents" during the day, only at night, and only one kitten seems to be doing this. We have 2 litter boxes set up in the spare room where they are confined with mom (baby gate allows mom to come and go) and mom is using the litter box, too. One is big and one is smaller. Anyway, is this normal? Should I do anything different? I think tonight I'll leave a light on overnight. I think it's so strange that it is only happening at night! Any feedback is appreciated.