Another worm problem? with pics

I too have a lawn with lots of bare soil and quite a few worm casts. Here is a pic http://homepage.ntlworld.com/john.kirk/lawn.jpg and a close up http://homepage.ntlworld.com/john.kirk/lawnclose.jpg
We have had a problem with our cats messing on the lawn, but this has all been on the hillock area. There is quite a lot of shade. I have seen no evidence of any creatures-would they be obvious?
It was laid in May and was lush through the summer, but not now!
I have given it a really good raking twice to try and get all the dead stuff out, but it has left it looking scarred!
Any ideas what could be wrong, and more importantly, how I can solve it?
Thanks

 

Shade is the real problem. In the natural world, grass does not like to grow in the shade of trees so it won't grow well in the shade of buildings and fences. Sure - you can get grass seed that is supposed to be suited for shady lawns. Grass needs sunshine - end of story. If it was laid in May as turves, then it was living on the sunshine it had stored in its leaves from its previous location. It may well recover if you are not too shady. Wait and see what it is like next year before despairing.

Worms are entirely beneficial. They are soil conditioners , fertilisers and greatly improve aeration and drainage. Wormcasts are incredibly rich in nutrients. Sweep them up or gather them with a trowel and treat your roses or other bedding plants with them. Excellent plant food at no cost to you and without risking chemical contamination.