Abyssinians and Chartreux have also had increasing incidence of dislocated kneecaps. (cfa.org)
This is similar to a slipped kneecap in a human. (pawster.com)
Like many small dogs, they can also be prone to luxating patellas (kneecaps slipping out of place), and Legg - Calve Perthes disease (a degenerative hip disease). (soonervet.net)