Offer includes the sensitive version. This is an excellent deal, unlikely to be repeated. No end date given. It is one of those 'while stocks last' deals.
Although it is advertised as 3kg, they usually supply it as 2 x 1.5kg bags, which I find easier to handle (and keeps fresher for longer, although not an issue for us, as we get through 1.5kg a week
)
I have stocked up! (21kg)
http://www.zooplus.co.uk/shop/cats/dry_cat_food/purina_onePS- Normal price in Sainsbury's is £15.50,Normal price on Zooplus, £9.99 (or 2 for £18.99)