On Tue, 29 Aug 2006 18:27:54 +0100, "nightjar" nightjar@insert my
surname here.uk.com wrote:

. It is also worth specifying 20mm grid
chippings. They are far less attractive to cats as a litter tray than
smaller sizes.

Agreed. They also don't get picked up in the soles of your shoes and
walked into the house as much as the smaller stuff (nor get stuck in
car/bike tyres)

Cheers,

John