J'avais des chats [avant]. The [avant] (before) is optional, as the use of the past tense "avais" implies that you don't have them any more.
You would say "J'ai trois chats" in French to express that you have three cats.
vous chats
j'ai trois chats.
galerie des chats
You can say "Elle n'aime pas les chats" in French to express that she doesn't like cats.
il ya deux chats
les chats sont formidables
'I have two cats' is spelled " j'ai deux chats " in French.
"... is called Leonie" is "... s'appelle Léonie" in French.
Blusher (cosmetic for the cheeks) is commonly called 'blush' in French. If you want to use a perfectly French equivalent (barely used in French conversations), it can be called 'fard à joues'.
je n'aime pas les chats
l'anniversaire de mon chat est le ...