Reply to cat-lovers and cat-haters: I think from now on I'll keep quiet about my cats, so many comments have been sent for this blog entry.
I remember being in New Zealand many years ago and every front garden in Aukland had large plastic lemonade bottles half-filled with water, strewn about the lawns and borders. They were to keep cats off. How or why this was meant to work I don't know, nor whether it did work. But I came to the conclusion that I'd rather have cats than litter.
I put bells on the collars of my cats, but one keeps losing them. I even found one collar string up in the apple tree. Maybe one day I'll find the cat strung up by its own collar in the tree.
Our two cats bury their own faeces pretty well, and they don't seem to be a problem to us or our neighbours. The dung is broken down fast, by beetle and fly larvae because I only treat the cats with systemic flea-killer if they have active flea infestations. One of the problems with dung is that it can be made insecticidal by chemical treatment of the animals dropping it. With cats and dogs this can be through flea-killing preparations put regularly into their food. It may get rid of the fleas, but the dung becomes poisonous to would-be dung recyclers. There are similar worries about cattle being treated for parasites leaving cow pats undecomposed all over the fields.
And finally a word of reassurance to mireille. Toxoplasmosis, the sight-threatening infection with a microbe found in animal dung is not very widespread and infections in children are not so very intimately linked to animal faeces. This was demonstrated by a study that found the children of dog-owners (who were therefore much more likely to come into dog dung than non-owners) were no more likely to show the disease. Finding animal dung in the garden is pretty unpleasant and children should always wash their hands after playing out their, but please let's not panic.