This world i started a bigger "zoo" project, collected some data and also talked with more experienced players, but still there are some questions to be answered.
Update 14/08/13 Mq = meat quantity, rounded down
Cow: 1/2*Mq intesitestines + 1/2*Mq meat
Calf: 1/2*Mq intesitnes + 1/2*Mq meat
Pig: 1/2*Mq intestines + 1*Mq meat
Pigglet: 1/4*Mq intestines + 1/2*Mq meat
Sheep: 1/4*Mq intestines + 0.8*Mq meat(needs testing)
Lamb: 1/4*Mq intestines + 1/2*Mq meat
Quality- (item q + food eaten q)/2 = result q
So lets start:
1. Food
* It takes 40 fields of beetroots(6 pieces per harvest) or 100 fields of 3-pieces-per-harvest things or 14 fields of pumpkins to fill food trough and replant the fields. Pumpkins seems to be the best choice but you have to maintain bigger field anyway due to the growth speed.
* When food troughs are empty animals starts to eat grassland(q10 food), they can stay with that for some time, just the food eaten q will drop.
- Do note that pregnant animals can't get sufficient food from grass and will starve.
* Talking about starving, it lowers the quality of products you get(pernamently?) and is represented by brown bar, red bar represents hunger.
- I've heard 3 opinions about how the animals bars work, im still confused with that. First is hunger, it's red. When it's low from lack of food, it lowers starvation, which is brown. Low brown means lowered product qualities. If brown hits 0, animal dies.
* Non-pregnant cows eats 4,8 units of food per day, pregnant ones eat 10x as much.
- According to my observations and informations i got, pigs/sheeps eats less than that. There is no problem to hold 100+ pigs/sheeps constantly breeding, but try to make the same with cows and you are f****.
How much does non-pregnant/pregnant pigs/sheeps eat?
* Only baby animals drink milk, calfs can drink from lactating cows/barrels. They choose the closest one.
- Still testing that, I have a barrel of milk near my never-pregnant cows, and milk is still drained.
Does baby pigs/sheeps also drink milk from barrels?
Range of lactating animals/barrels is?
* Baby animals food eaten quality at birth is equal to milk quality of mother, changes slowly(ratio?) while drinking better/worse milk.
* When changing into adults animals starts to eat from food trough, still it takes 2+ days to notice even a small change.
That means my animals broken or it really takes so much time to change food eaten q?
2. Breeding
* It takes 4,5 days for new animal to be born, there is a chance for twins!(any1 noticed triplets?

* When baby is born it can be dropped over the wall(need to make 1-2(?) tiles empty area between croft and the outer wall to not lose them and run away.
- "I reckon they pick a direction to give birth in, and the baby is placed on the first open space in that direction." - Potjeh.
* Stats of the newborn are softacapped by males breeding quality, mother's is irrelevant (except of course for producing male babies with high breeding q).
- There is -5/+20 RNG working with that for all animals, more info needed.
3. Resources
* Resources like milk/meat/intestines are softcapped by food eaten quality.
- Quality- (item q + food eaten q)/2 = result q
- Wool is not affected by that.
* Cows can store 10l of milk and sheeps stores 3 pieces of wool at most.
- Cows produce 14.4l of milk per day at 10 milk quantity. It scales linearly, so a cow with 40 milk quantity would produce 57.6l of milk per day.
- Info needed about the timers when the milk spawns (I'd say it spawns every ~2 hours).
- No idea about wool respawn timers. Taking it when needed.
* Meat quantity = amount of pieces of meat you get + half of that intestines. Baby animals gives half of that.
Update 14/08/13 Mq = meat quantity, rounded down
Cow: 1/2*Mq intesitestines + 1/2*Mq meat
Calf: 1/2*Mq intesitnes + 1/2*Mq meat
Pig: 1/2*Mq intestines + 1*Mq meat
Pigglet: 1/4*Mq intestines + 1/2*Mq meat
Sheep: 1/4*Mq intestines + 0.8*Mq meat(needs testing)
Lamb: 1/4*Mq intestines + 1/2*Mq meat
* Food eaten quality doesn't affect the quantity of products.
Well that's what i gathered for now, i will add a chickens section later, but they seems to be pretty much explained on wiki already.
I'd would be very grateful for answers and also for pointing some more things i didn't mentioned there and i'll keep this post updated!