filter unique records with its corresponding column

Hi, everyone, i am new here.
Hope someone can solve my problem

here is the thing:

Column A B
Pig 20
Pig 3
Cow 10
Cow 3

what i wanted

Column A B
Pig 20
Cow 10

I tried unique filtering but it wont put in the column B if i am to unique filter the column A

Any help appreciated