We’ve had an email from Bea:

I’ve always put my horse’s tail and mane clippings on the his manure heap to compost down but I recently wondered if I could use them for something else instead. I’ve heard of horse hair mattresses but don’t think I have enough for that!

According to Wikipedia, horsehair is/has been used “for various purposes, including upholstery, [artists & shaving] brushes, the bows of musical instruments, a hard-wearing fabric called haircloth, and for horsehair plaster, a wallcovering material formerly used in the construction industry and now found only in older buildings. .. [It is also used in] the crafts of horsehair hitching, horsehair braiding, pottery, and in making jewellery items such as bracelets, necklaces, earrings and [hair clips].” I think the latter group is more appropriate to reuses at home – but the former group might provide inspiration on where you could pass it on — for example, if you had a stables and generated a lot of horsehair, a local old-fashioned upholsterer might be interested in it.

You can compost it of course (as Bea has been doing) and some people use it (along with human hair clippings and anything similarly bit-ty) to discourage slugs from delicate.

Any other ideas?