One of my female cats often pees like a male cat in the litter box....standing straight up. Sometimes she squats like a little girl should. Sometimes she starts out squatting and ends up in a full standing position. Sometimes she just walks in, stands, and pees against the wall of the litter box. The problem is, when she does this, she often makes it over the top of the litter box and onto the wall & floor. The litter boxes are the high back rubbermaid ones. Does anyone else have a female cat who pees like a male cat? Is this normal behavior or do I have a unique cat?