Harvesting Milk from Cows

Hi,

I've noticed that when i harvest milk from my cows one milk is missed and does not go into my barn.

I have 15 cows, i harvested them all at the same time (currently doing so for the derby) and the counter said 14 milk, on feeding my cow's 15 feed were used. So it would seem one milk is getting lost in the system somewhere.

Are you sure all 15 cows were fed?Maybe you forgot to feed one last time you milked them? (Which may have happened for instance if you buy 5 cow feed from Greg and then make another 9, total is 14 but you have 15 cows)