Two of my jersey girls were dairy culls due to low production. They came with papers, and both had been show heifers. We paid $600./cow and they were bred back. They are so easy to deal with, and once we left the calves on them their production went way up and even though the calves are weaned now (at 5 months) their production has stayed way up. I think being able to raise their calves rather than have them pulled away immediately helped their production. We milked only in the a.m., and left the claves on throughout the day, and seperated them at night. We still milk once a day, and have had no problems after about a year on this schedule. We use a surge milker. I'm getting about 7.5 gallons/day from them. The jersey/guernsey gives about three gallons, if she's in a good mood!!!! It's alot of milk!!!
Anyone considering a milk cow, should visit Keeping the Family Cow. It's the best and teaches me daily. Great forum for milk and cheese recipes as well.