What the heck is wrong with Cholov Yisroel Milk?

This question has been on my mind for a while. Why is it that Cholov Yisroel milk does not last long at all? There seems to be little differentiation when it comes to a brand either. Whether it is New Square, Golden Flow,Ahava etc. the milk spoils quickly. I have not had the same experience with non-cholov yisroel brands so where does the problem stem from. One explanation I was given was inadequate refigeration on the trucks. How can we tackle these issues? Is there a problem with these cows? Do they have anxiety from the kosher supervision? hmmmmmmmm...