Snowytoshi – 2nd cut should be just as fresh as the first cut. It has to do with the growth period and when it is cut during that.
Bigmak – brown hay gets a bad rap. Plain brown hay isn’t as nutrient rich as green hay, HOWEVER, hay is mostly consumed for the fiber content, not the nutrient content. You just have to watch for dark dark brown hay — blackish hay, that doesn’t smell fresh. If the hay is brown and mixed with green and it all smells fresh, not overly dusty (like mold particles flying up), then your hay is probably fine. My bunny, Rucy, actually used to prefer the browner pieces. Go figure.
Seasonal and growth aspects can cause normal brown hay. Sometimes if hay bends over itself and doesn’t get as much sun, it can cause browning — totally normal. Also, less sun, or too much sun can change the color. Weather, harvest times etc can all contribute to hay color changes. Though the lovely greens are aesthetically pleasing and do have a higher nutrient content, rabbits digestive systems are MEANT to get the most out of nutrient sparse foods and so it doesn’t cause a problem for them to eat high fiber, brown hay.
Again, you just have to make sure it’s not darker/black hay that smells musty. That’s the real difference.