Youre missing out on some serious flavor by not roasting the bones prior to simmering...In a roasting pan add your bones and some halved carrots and halved onions along with some halved celery...the ratio of carrot, celery and onion should be 25% 25% and 50% in that order...coat all of the ingreds with some canola oil and roast in an oven at 450 until the bones and the veg are all golden brown (dont worry about the added canola oil it gets removed when we skim the stock as it cooks)...when the roasting is complete remove all of the roasted ingredients to your empty stock pot...place the roasting pan on the cook top and turn on two of the burners and add cup of two of water and once the water begins to boil scrape up all of the brown bits in the bottom of the pan...add this to the stock pot and fill the pot with cold water...add a bunch of fresh parsley, bay leaves and some black peppercorns...bring to a boil and reduce to a simmer...you can simmer this for as long as 24 hours if you want as long as you keep adding water to the stock pot to account for evaporation...every so often skim the top of the stock as it cooks to remove impurities and any fat accumulating there...when your happy with the stock...strain into clean containers...cool...label and freeze for further use. Thsi work best with veal bones but cow bones will work too!!! Good luck...