The use of a litter box varies at different stages of a cat's life. In particular, older cats may reject the litter box due to declining physical functions and mobility issues, and may urinate or defecate outside of it. 
If this happens, first consult a veterinarian to determine if it's caused by an underlying medical condition. Increase the frequency of litter box cleaning and provide more, larger, and shallower litter boxes for your cat to easily access. Relocate the litter box and replace all the lining or tray. If your senior cat previously used to defecating outdoors but is now unable to control it, you should encourage them to use a litter box.
In addition, when choosing a litter box for senior cats, it's crucial to consider your cat's preferences and the ease of use. We recommend the Zhongheng fully enclosed dome-shaped deluxe litter box. It features a simple design, ease of use, portability, and robust construction. This fully enclosed deluxe litter box offers excellent antibacterial and deodorizing effects, ensuring a hygienic and comfortable environment for your pet. The innovative integrated door frame design makes it easy for your cat to enter and exit, and the top includes a handle for convenient carrying. The spacious design provides a clear and unobstructed view for your cat, making it comfortable and relaxing. With its beautiful craftsmanship and high-quality construction, how could a cat not love it? Cat owners who are interested should definitely check it out!