Russians change the actual noun so no it doesn't make it any easier than even French or German

1. Masculine Noun: Кот (Male Cat)

Because a male cat is a living animate being, its accusative case looks like its genitive case.

Nominative (Subject): кот (cat) / Plural: коты́ (cats)Genitive (Of/No cat): кота́ (of a cat) / Plural: кото́в (of cats)Dative (To/For a cat): коту́ (to a cat) / Plural: кота́м (to cats)Accusative (Direct object): кота́ (see a cat) / Plural: кото́в (see cats)Instrumental (By/With a cat): кото́м (with a cat) / Plural: котами́ (with cats)Prepositional (About a cat): о коте́ (about a cat) / Plural: о кота́х (about cats)

2. Feminine Noun: Кошка (Female/General Cat)This follows the standard soft/hard feminine -а ending declension pattern.Nominative (Subject): ко́шка (cat) / Plural: ко́шки (cats)Genitive (Of/No cat): ко́шки (of a cat) / Plural: ко́шек (of cats)Dative (To/For a cat): ко́шке (to a cat) / Plural: ко́шкам (to cats)Accusative (Direct object): ко́шку (see a cat) / Plural: ко́шек (see cats)Instrumental (By/With a cat): ко́шкой / ко́шкою (with a cat) / Plural: ко́шками (with cats)Prepositional (About a cat): о ко́шке (about a cat) / Plural: о ко́шках (about cats)Common Affectionate or Slang FormsKitten (neutral): котёнок (singular), котя́та (plural)Diminutives / Cute names: ко́тик (male pet), ко́шечка (female pet), ки́са / ки́ска (kitty)Augmentatives / Big cat: котя́ра / коти́ще (chonky/huge tomcat)