found this at
http://www.botanical.com/botanical/mgmh/s/sunfl100.html
"The seed makes excellent chicken-food and feeding fowls on bruised Sunflower seeds is well known to increase their laying power. "
"---Sunflower-seeds as Poultry and Cattle Food---Sunflower seeds have a high feeding value - the analysis in round figures is 16 per cent albumen and 21 per cent fat.
Being so rich in oil, they are too stimulating to use alone and should only be used in combination with other feeding stuffs. Fed with oats in equal quantities, they make a perfectly balanced ration. Since both of these articles contain a big proportion of indigestible matter, particularly in the husks, grit must on no account be withheld, if the birds are to derive full benefit.
As food for laying poultry, it ought in the opinion of some authorities, not to be used in excess of one-third of the total mixture of corn, owing to its fat-producing properties.
The seeds are palatable to poultry and greedily devoured by them. A very common way to supply the birds with the seeds is to hang up the ripe heads just high enough to compel the chicks to pick them out, for when the heads are thrown into the yard, they are trodden on and wasted.
Sunflower-seed oil-cake is a valuable article for bringing up the feeding value of some of the poultry foods and was specially in demand for this purpose in war-time, when the supply of good cereals ran short. It is more fattening to cattle than Linseed cake, being richer in nitrogenous substances, containing 34 per cent albumen. As well as being an excellent food for poultry, and also for rabbits, it keeps both horses and cattle in good condition. It is said that cows, fed on Sunflower-seed oil-cake, mixed with bran, will have an increased flow of good, rich milk.
It is largely exported by Russia to Denmark, Sweden and elsewhere for stock feeding."
"---Litter---Even the stems and seedless heads need not be wasted where fowls are kept. Many may prefer to use them as fire-kindlers, but they will, when thoroughly dry, come in useful as litter for the laying-houses. When dry, they can be passed through a chaffcutting machine and be added to the other litter - peat-moss or dried leaves. They need to be made into a scratchable material for hens, but for ducks, the material can be placed deeply in the house as a bedding. Ducks need litter to 'squat' on rather than to scratch in."
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