Ok, so I have one Jersey (Ginger) and one Jersey/Holstein (Rosie) cross, both heifers. They are both 1 1/2 yrs old. I have had horses, goats, pigs, etc., but these are the first cows I have owned. Neither have been bred yet, however, Rosie seems to be getting a little more full in her udder. I noticed this recently and felt both of their udders, and the one definitely feels different and more full and firm. Now, Rosie is a bit of an escape artist and has hopped the fence in the middle of the night on a couple of occasions, but she would have had to hop into someone elses fence then back out again to be bred. Also, a couple months ago some neighbor bulls got out and were running along my fence line when my girls were in heat (while I wasn't home) but they didn't get in the pasture. Plus, that would be too soon for her to start baggin up I would think. Plus, she doesn't really have a big belly. How should the udders of a 1 1/2 yr old hiefer look and feel if they have never been bred? When would they start bagging up if bred? Sorry if this is a stupid question, but this is my first go around with cows and I am puzzled! They do not look red or infected or I would think maybe mastitis? Thanks for any input!!