We have a couple Jersey steers my kids bottle fed and we are wanting to take them I. To butcher in April if we can. I have appointments booked at the locker. They are 12-15 months old and are only about 600 pounds. We just started giving them about half a 5 gallon bucket of cracked corn and they are on pasture. Do we need to get a better feed? Any tips on how to bull them up this winter so they are ready for the processor?