Tense human-feline relationships are addressed by cat behaviorist Jackson Galaxy. In the first episode, a cat comes between a woman and her boyfriend, and a newly engaged couple deal with his dislike of her cats.

Source: Animal Planet

In the Season 4 premiere, a cat that is hearing- and vision-impaired and no longer uses its litter box lashes out at its owners and their new kitten. Also: Fights between a cat and a dog delay a couple's plans to start a family.

Source: Animal Planet

A 95-year-old woman suffers violent attacks by her cat; a woman lives in a studio apartment with two cats that hate each other.

Source: Animal Planet

A cat's stuffed animal causes odd behavior that confuses its owners; one cat's vicious attacks on another consistently draw blood and scares it into peeing on itself.

Source: Animal Planet

A cat attacks others that live under the same roof with ruthless efficiency; an adopted stray has trouble shedding its aggressive side and adjusting to its new surroundings.

Source: Animal Planet

A cat that pees on everything comes between two roommates who have lived together for five years; a cat is constantly bullying another in the same household.

Source: Animal Planet

A cat pees everywhere, including on the couch, beds and countertops; a cat with cerebellar hypoplasia constantly attacks its owner's other cat.

Source: Animal Planet

An older cat is terrorized by a younger one that's new to the household; a cat marks its territory all over a woman's house.

Source: Animal Planet