Thank you for all the replies all of it is great advice.
She let me milk her and seemed fine about it and the milk looked and smelled fine.
I have spent quite a bit of time out there today and haven’t seen him try to nurse once. She seems fine with him her normal self. She has had 4 foals and they have all nursed up until 6 to 7 months when I weaned them and she has never pushed the foals away at any point.
He has been drinking water out of the water bucket all day and grazing all day and is his chipper self.
Really strange. I will finish his biosponge up today and see how his stool is tomorrow and start the gastrogard.
Can’t hurt to see if he may have ulcers although wouldn’t he have a symptom? ( uncomfortable or not eating anything?)
Suppose there is always a first for everything! 
I feel bad for the mare because she is so bagged up and it’s 104 today!!!
I will also call vet again tomorrow to update her and see if she wants to take some bloodwork.
Blood work would find what exactly? Infection?