We have 3 cats: a 3 yr old male Bengal (Stark), a 5 yr old female Bengal (Kirri), and a 7 month male Savannah (Ari). All are fixed. We have three litterboxes: a litter robot, Petsafe SimplyClean, and a plain old fashioned hand-scoop version.
Our problems are with Kirri and Stark.
Kirri first...