Our dear Violet, who aways had the most impeccable letterbox habits if the conditions were perfect (proper litter, grass under her feet, secluded but with a view out, to name a few) seems to be having difficulty getting into her box. She had the most graceful jump, whether it be from rug to rug, into the litterbox, or from the windowsill over the fence into off limit areas. But her 11+ years is showing. Last night, she landed midway on the edge of the letterbox, so we pulled an old carrier bottom from storage. Its lower edge is perfect for her, and it is easy to clean.