I always go with the larger the better and often have my cat owners use plastic storage boxes instead of traditional litterboxes. But by separating out human urine before it gets to the wastewater plant, Rich Earth cofounder Kim Nace says they can turn it into a robust fertilizer alternative: a "local, accessible, free, sanitary source of nitrogen and phosphorous. What Else Should I Know? But if you have this problem, it's still a good idea for you and your parents to talk to your doctor about it.
If the owner is concerned with the cat throwing litter out over the edges, she can purchase uncovered litterboxes with tall sides unless she owns an older, arthritic cat that may have more difficulty climbing over tall sides. Trying to wake up someone who wets the bed can be hard — the person just stays asleep. They might help you temporarily, but they don't cure bedwetting. Other times, however, the problem may be more complicated and need further assessment from a trained behavioral consultant.