3 cows is always best as the one cow ca see more than 1 cow and thus thinks she is in a herd... difficult to explain
but two with calves is still way better than one with a calf
I would be weary with two cows plus calves on 3 acres
even with hay can get pretty poached up even in the summer, I would devide it up, would be best to devide it all up into small paddocks, 1 acre paddocks? as three paddocks would be better than 2
and rotate to help with worm burdens, re growth and sward quality and of course prevent over grazing and poaching
Anything cross dairy is generally a long tall, heavy cow with a big appetite, even the hereford crosses, are they cross holstein or british friesian? or a different dairy cow?