Ramblerskitchen,
Some great advice above, and if there were two messages I could give new pig keepers on feeding they would be
Feeding is a guideline not a formula! Yes 1lb per month is a start point, and additional rather than substitutional feeding of bread will not have helped, but give any two children precisely the same food, and they will NOT turn out the same, one will be thin and lanky and the other a couch potato - the same is true of pigs. For your next lot, work on the principal that pigs will start by putting on brain/nervous system/bone, then muscle, then fat. The muscle to fat change takes place around 5-6 months (another guideline not formula!), but also varies according to a multitude of different factors inc. time of year, breed, sex, weather. So practice feeling your pigs - you will not see fat by eye. Feel the backbone regularly - easily felt - too thin, hard to feel - too fat, practice on your friends and you will soon get to feel what is right. The more you feel your pigs the better you will get at it. Change your feeding to then make the right changes. One couple I know cut their pigs rations in half for the last week before slaughter, just like humans the first drop in weight is to shed the easily lost fat, so this reduces fat considerably without affecting meat. others don't like the thought that daisy's last week is spent on a diet!
Fat is good - OK so too much fat is not good, but if you are comparing your joints to the supermarket (or your customers are) then you are at the wrong start point. It is the fat that bastes the meat and stops pork becoming dry (as supermarket pork does), and it is the fat that really adds to the flavour of your meat. So start by reeducating your customers to expect and welcome fat - they can always cut it off after cooking. Slow roast a fat pork belly for 5-6 hours and you will have the sweetest meat you have ever tasted.