The blood usually goes in the lime for the final wash - gives the house a lovely reddish brown colour that over the years fades to pink.

I know about dung in bricks because it's still used in some countries. Why waste valuable topsoil on bricks when you can use what the animals give free and gratis.... We have a Victorian house and whilst replastering a wall I noticed that the plaster contained rather a lot of coarse hair - probably horse, to aid cohesion.

AS for the stickiness of dung... I grew up on a dairy farm. There is NOTHING stickier than the dung of a cow that's been fed on fresh grass. Unless it's the smell.. that sticks around for months!

LTS