my snick has arthritis and is long in the body. she prefers a covered litter box. she'll be 14 years old in august.
i was having the same thing happen with my snick until i placed the lid to a long under the bed type plastic storage bin under her litter box. now when snick (very occasionally) pees over the edge of her litter box it just collects on the upside down lid underneath the litter box. i still need to clean it up, but the urine is not on my flooring and it's not a big deal for me to clean up. i just wipe with scented baby wipes the underside of her litter box, then use paper towels to get the urine up off the lid/mat and wipe that with the scented baby wipes too. the litter box and litter mat get placed on the upside down lid/mat again......and that's it. every so often i'll take the lid/mat outdoors and spray it with simple green (which does not react to pet urine), then rinse off well with water and let it dry.
if you needed to, you could use the upside down plastic storage bin lid underneath the litter box and leave room at the front of the lid/mat to place a puppy pee pad.
i was having the same thing happen with my snick until i placed the lid to a long under the bed type plastic storage bin under her litter box. now when snick (very occasionally) pees over the edge of her litter box it just collects on the upside down lid underneath the litter box. i still need to clean it up, but the urine is not on my flooring and it's not a big deal for me to clean up. i just wipe with scented baby wipes the underside of her litter box, then use paper towels to get the urine up off the lid/mat and wipe that with the scented baby wipes too. the litter box and litter mat get placed on the upside down lid/mat again......and that's it. every so often i'll take the lid/mat outdoors and spray it with simple green (which does not react to pet urine), then rinse off well with water and let it dry.
if you needed to, you could use the upside down plastic storage bin lid underneath the litter box and leave room at the front of the lid/mat to place a puppy pee pad.