Live Birth. After mating, females are pregnant for about seven months -- usually between 205 and 217 days. Instead of having a litter of several small babies like many mammals do, porcupines have one large baby. A baby weighs about a pound, typically ranging from 14 to 18 ounces. Their quills are soft when they're born, but the quills harden within an hour.
Fuel Cost. The cost of wood pellet fuel is usually given in dollars per ton; the average price of the fuel is typically around $250 per ton. The cost of a cord of wood, the fuel burned by a conventional wood stove, is around $200. The average home uses about 7.3 tons of pellet fuel or 6.5 cords of wood per season.
1 Depending on the brand and the store from which you purchase the wood pellets, you are going to be paying anywhere from $190 to as much as $290 per ton.2  However, if you want to purchase by the bag, plan on budgeting around $3.50 to $6.50. Depending on the brand and the store from which you purchase the wood pellets, you are going to be paying anywhere from $190 to as much as $290 per ton.