I tried searching for it except the words "hay" and "how" to short for the search thingy. Is it easier to buy hay by 45 lbs at a time? how long will it ask. And also, Say I buy a guinea pig that's new born (just saying), how many pounds of alfalfa hay do I need to buy for it to last the first six months of it's life? Basically the main question is, How much does 1lb of hay last with two guinea pigs?