Posted: 18/04/2017 at 14:20
Yes, take out the obvious lumps and then fork over the rest to mix it well. Add plenty of organic matter to improve teh sandy soil - cheap bags of multi-purpose compost or soil conditioner sold in DIYs and garden centres. Fork that in too and then cover till you're ready to sow or plant.
I grew veggies happily for several years in a typical 30s sized garden with 7 of our own cats plus 3 next door and more either side. You just need to make sure you wash your hands careful after gardening and also wash any veggies thoroughly before eating. You could try covering veggie beds with weed suppressant membrane or even just sheets of cardboard and planting thru slits made in the form of a cross and then just fold the corners back once you have planted and watered thoroughly.
It would work too for ornamentals but then you'd need an ornamental mulch of chipped bark or slate chippings. Not gravel as cats love that too.
A water scarecrow or a dog permanently on duty are the only effective deterrents.