I'm just wondering when it comes to hay, how do you know when to change it? I don't like wasting it, and prefer to keep it to a minimum. But how do you know if the hay is still edible but the bunny is not hungry, or if the bunny wants to eat hay, but simply refuses to eat the left over hay? Also, hay is messy and gets everywhere, so I don't like putting a ton out at once, also due to the fact maybe it will get spoiled faster thus wasting it. Its kind of hard to figure out when a bunny is hungry compared to like a dog. But I did forget to fill up their pellet bowl and it was empty, so I filled it up right away and the bunnies started eating it right away. I also have not figured out how much vegetables they can eat a day, because sometimes they eat it, sometimes they don't. And I don't want to leave too much vegetables that it gets rotten and they eat it, and get sick. So how much vegetables can two bunnies eat in a day?