We have 2 six month old sibling kittens. They are adorable and have been a dream from the moment we brought them home. They used the litter tray from day 1 and never so much as an accident anywhere. They are both now neutered and once they'd recovered we started letting them venture outside. They love the garden and learnt how to use their cat flap quickly so tend to just come and go as they please now. The first 10 days or so, they carried on using their litter tray indoors but now don't use it at all. They are doing all their business on the lawn!!! I mean, everything. We've owned cats before and have never had this. I thought they would automatically take to the soil, dig a bit, perform and then cover up (as they did with litter!) Everybody I've mentioned this to, agrees that it's quite unusual for cats to just deposit their number 1's and 2's on the grass. Has anybody experienced this and more importantly, does anyone have any wise advice how we can stop it? I'm thinking we need to move a litter tray outside to a sheltered spot or put some litter into the soil?? Any advice very much appreciated. Picture for attention.