No offense, but I don't think your cows are fat... mine have more cover on their ribs from just pasture , with current calves on them. I don't like fat, but even with the drought conditions we have had this year, all our cows are in very good body condition, considering they are feeding calves. The heifers being bred are FAT in my opinion, and there are more on that pasture than there has ever been...
You know your cows, and your conditions... but I do not think your cows have enough body condition at this time of year, going into winter. I like a little extra fat on their back for going into the cold as they will lose some of it by the time spring comes, calving and all that.