Feeding cows sometimes results in hitting them

I'm not sure if it happened before Build 12 as that's when I started playing.

I have a pen of cows. When I go to breed them, the first one always works, but then it seems if I go to another cow right away and hit feed, it consumes my wheat but also I proceed to hit the cow. At first I thought I was holding too long or even double tapping accidentally. I have now been very conscious of that and it has happened 4-5 times in a row, every "second" feed.