Newbie Question

OK...got a newbie question here.  Have a handful of heifers that are bred.  Should be about 3 1/2 months bred.  Well, over the past week I've noticed that there are 2 that are riding others, and 1 who was getting rode stands still while being rode.  I am getting them palpated ASAP.  I've check for bloody discharge, etc. and nothing.  The 2 that "were riding" are extra red and puffy.  What is your opinion on this?  Thanks for any information!

The one standing is almost certainly not bred.  The other ones could be reacting to the third.  If you dont see them stand, and they are simply jumping, they could very well be bred.  The one standing however is a different story.