I have 3 cows that are going to calf in March. They weight around 1300,1250 and 1150 pounds. Have all the hay they want and feeding them 2 pounds of steer feed each a day. They are like drinking 125 gal. of water every 2 days, give or take 25 gal. It's a 175 gal. heated tank they drink out of. Now can they water founder on that? Been told to only give them 5 gal. each a day. What should I do??