Good for you wanting to use 'The Rest' of the animal.
Grab a
coffee, or a bottle of wine, this is going to be a long one. It basically starts with a small summation of
local (to my area) laws and practices around slaughtering and butchering animals. A small whinge about how it doesn't honour the animal and is excessively wasteful. Finishes up with my solution and what I do with all the odd bits that most people waste.
A lot of regulations here in Canada regarding where we process and what we keep of the animal if we are selling meat. I suspect France must have some strict ones too given how the EU can get about food.
HOWEVER, locally, we can slaughter our own animal for our own consumption on our property. What this means is that I can sell the animal live to a person or group of people, rent out a few square meters of my
land, arrange with someone who will give the animal a gentle end (my customers pay him direct),they hire me to teach them how to cut up the meat and presto! It fits with the current local legislation (Know that posts on the internet often outlast the law, so don't take what I say about legalities to be a forever truth).
There are lots of reasons to send an animal to an abattoir. They are experienced, they do better at cutting up the meat than most can do at home, government inspected for health and quality of the meat, and so on and so forth.
It's amazing how many local small farmers aren't able to pass inspection because the animal has an illness, damage, or other element that makes it not eligible for sale or worse, could be harmful for human consumption. One Christmas season we took our ducks to the abattoir and our 25 ducks were the only ones that passed inspection in that run (they processed over 250 waterfowl that day). The biggest problem was damage in transportation, the second biggest problem was the animal was kept in poor health. It's not normally that high a failure rate, but it was devastating to every other farmer who spent all that money, time and
energy raising their animals and couldn't sell the meat. That's the farmer's own fault for their mistreatment and ignorance.
When you are just starting raising your own meat animals, I highly recommend getting it inspected so that you can learn how you care for your animal effects the quality of meat.
Depending on the animal of
course, the loss to waste (aka, not used portion, the bit tossed out that could have been used) is up to 80%. An example:
Live weight (woolly jumper munching grass in the field, living and breathing) 100 pounds.
Hanging weight (dead lamb, skin off, guts out, hanging in the cooler to age) 60-80 pounds.
Freezer weight (cut up, wrapped, and in nice, neat packets ready for your home freezer or sale) about 40 to 45 pounds.
This is our
experience. Keep in mind that different parts of the world cut up the animal differently, and different places use different parts of the animal. But this is our local standard loss.
40 pounds of meat, that's 40% of the lamb comes home again. What happens to the other 60 pounds? They usually get tossed in a special trash bin and trucked off to who knows where.
This is something to consider when raising your own animals for meat, especially larger animals. Pigs have less loss than sheep, but still an amazing amount.
Whenever possible, I home process. This IS NOT because I'm heartless and like killing things - despite many people lecturing me on how cruel it is. I home process the animal because I 1) hate the stress they experience in transport to the slaughterhouse and 2) can't see how throwing half of the animal in the trash honours it's life. It's not easy to do it at home. I cry buckets and lose about two weeks sleep per animal. But it's easier on the animal and less wasteful.
At home it looks like this. Live weight 100 pounds, hanging weight 60 pounds (however the organs go in the freezer for eating later and the skin gets tanned, the head is either made into head cheese or as payment to the fellow who does the ending). So actually a loss of about 5 to 10 pounds since I don't usually keep the
lights or tripe. That 5 to 10 pounds go to feeding the chickens. Live weight to hanging weight, actual amount wasted = 1 to 5%.
Hanging weight to freezer weight - Everything now is edible to humans, so I have no loss. The fat, I keep for cooking or in a pinch, making
soap or hand lotion. The meat, if not good
enough for a specific cut, then I cut it into stewing meat or ground or sausage...
Home processed animal with a live weight of 100 pounds, has a freezer weight of 80-90 pounds, with the remaining going to non-food projects. Actual waste 1 to 5%. That's a huge difference than the 60% waste the abattoir has.
This just something to be aware of if you're interested in raising your own meat. Like I said, pigs will have different numbers.
Ways of reducing waste when processing an animal:
Make friends with a hunter and have them help you home process. They not only know what to do, a good hunter knows how to evaluate the carcass and tell the health and condition of the animal. Get them to walk you through this step, it's a vital skill.
Bring the meat home after hanging and butcher (cut it up) yourself.
Ask for the organs and trimmings when having the animal processed at the abattoir (they my or many not remember to include them).
Have a small, artisan butcher do the actual cutting of the meat. They are more experienced with utilizing the whole animal.
What to do with the rest?
Now here's the good part. My favourite part.
FAT -
Lard, drippings for frying, leaf fat,
Caul Fat,
More about lard...
FAT (not food) - Hand lotion, lip balm, soap making, lubricant for machines...
BONES - Broth is my favourite, marrow bones, bone jelly...
BONES (not food) - tools (think medieval sewing needles &c),
art, buttons, nutrition for plants, yummy for dogs...
INNARDS - guts for sausage, lights and pluck (illegal in the USA) for haggas and haggas like dishes, blood for sausage and soup, liver for frying with bacon and onions, liver for pate, Head and brains in headcheese (not just for pork, tastes good with mutton too), fried brains, poached brains...
INNARDS (not food) - PLANTS LOVE ALL INNARDS, especially blood. Can use the guts for string kind of thing, also great for teaching kids about anatomy, this is a heart, this is liver... (even better if you cook the innards up afterwards)...
That
should get you thinking about how to utilize the whole animal. This evening, I'll gather up my
books and see if I can make you a reading list.
I think it said you are posting from France. Any local traditions surrounding meat you can tell us about?
Video about processing pigs that inspires me