battleship potemkin (1925)

Unknown
Two men fish off the dock whilst a white cat sits casually cleaning itself.

dr. goldfoot and the bikini machine (1965)

Rasputin
A spy is checking out a funeral parlor and finds a black cat is lying in front of a display coffin. He hides as a henchman enters, tells the cat 'I’ll feed you later, Rasputin' and climbs into the coffin. Intrigued the spy goes to look, promptly stepping on poor Rasputin's tail!

national lampoon’s animal house (1978)

Unknown
A Siamese cat hangs out with a chill teacher and some of his students.

whilst hardly noticed a black cat is also lapping up the attention on a students lap.

a simple plan (1998)

Unknown
Hank (Bill Paxton) works in a feed mill and as he greets a friend we see a Siamese cat run to a food dish.

spider-man: far from home (2019)

Unknown
Spider-man, or rather Peter Parker is on a school trip to Venice and on checking into their hotel they see a ginner sat on a table awaiting their arrival. Or more probably just staying off the floor as its waterlogged!

sorry, baby (2024)

Olga
A professor lives alone with her gray tabby who occasionally appears.

Later in flashback we see her find Olga as a stray kitten. The cat distribution system works and she takes the kitten into a store. Whilst there the cashier accuses her of bringing a cat in, which she denies, despite the kitten visably poking out from under her jacket!
The credits list the cat as Noochie, but whether that is the adult Olga or the kitten is not stated!

the mighty thor against the queen of the amazons (1963)

Unknown
Before a gladiator contest the queen of the amazons is handed a white cat. Then places it to one side.