Addition to interesting puzzles

I read the appearance of the problem in Habre, and remembered another one.

On vacation, I showed it to the teacher from the school of the FSB. He said that he had taken from the 5th grade textbook. In my memory, three people have solved it. A boy of 10 in 5 minutes. A woman in 30 minutes and my friend, in a week.

Cow - 2
Goat - 2
Cat - 3
Doggy - 3
Rooster -?
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I didn’t even guess, for my brain immediately began to smoke.