Hmmmm, depending on how tolerant Mosi is, I would try a syringe with luke warm salty water, and gently
flush dirt out with that (dont think Kittys have nerves in their paw pads ??) and maybe try to encourage
litter out with a cotton bud or similar ??
you may need 2 ppl to do this
P.S. a syringe WITHOUT a Needle