Learn Polish: Teraz karmię moje cztery konie. - Now I am feeding my four horses.

Konie is the direct object of karmię (I am feeding), so the phrase is in the Accusative case. However, for the numbers 2, 3, and 4, the Accusative plural looks exactly the same as the Nominative plural for "non-masculine-personal" nouns (which includes objects, feminine nouns, neuter nouns, and animals like horses).

Why is the word for 'my' moje and not moi? Aren't horses masculine?

A single horse (koń) is a masculine animal noun. But in the plural, Polish splits nouns into just two groups: "masculine personal" (groups with at least one man) and "everything else". Since horses aren't human men, they fall into the "everything else" group, which uses moje instead of moi.

How does the spelling of koń change to konie in the plural?

To make the plural of masculine nouns ending in a soft consonant like -ń, we usually add -e. When we add an ending that starts with a vowel, the soft ń changes its spelling to ni to keep the soft sound. So, koń becomes konie.

What is the dictionary form (infinitive) of karmię?