Yours sounds to dry to heat.
My Dad always tried to bale when there was a little green left in the crop.
It would heat a little but we never had a fire.
If you leave it dry to long you loose a lot of the nutrition & end up with roughage.
Fills them up but wont fatten.
Better to err on the side of caution though as a beginner.
||What bodger said. If you hay is nice a dry you can stack as you would straw.|
Tav`s Dad is spot on,
Green hay is not the problem of overheating,its the moisture content,
Dry greenish is the best hay you will get.
I would get your`s baled straight away,or you will be stacking tinder dry stalks,with no feed value at all.
A tip,most likely Tav`s Dad did the same,you mentioned you had shaken the hay 3 times,before each shaking,grab a handful,and twist it really tight with both hands,you will notice the difference each time, less moisture,try next time.