I scrubbed my kitchen floor yesterday because one of them still does n't understand the concept of the litter box . Not sure which one yet . They all seem to think the food dish is a bed and toy as well , so I ' m thinking they 're all using the food dish as a one stop restaurant , potty and inn . I think I ' m getting Elizabeth into dance class next week .

Question: What may be the reason for their complaint ?
Answer: Their cat keeps ignoring the litter box .None of the above choices .Their daughter is leaving a mess in the house .All of their cats ignore the litter box .