Vegetable Plants are Growing so well

Along with all the usual mountains of vegetable plants I'm growing all the veg from my 'Grow Your Own with Pippa Greenwood'  system, so as usual there is lots of activity in the veg plot! But it seems I am never on my own up there, hoards of pigeons (or that is what it feel like!) are lurking everywhere, waiting to pounce on the peas, beat up the brassicas and consume the courgettes!  This year it is worse than ever, so I have a whole array of scaring devices to rotate around the plot - hanging CDs, bits of hosepipe that are supposed to look like snakes, two real cats (!) and two real children....but as usual it is the net covered tunnels and frames which are the most reliable.  The other day one of my broccoli 'Ironman' plants became uncovered and within 12 hours all I had was a set of mid veins.  I am starting to feel I have a persecution complex....perhaps I have, but then I am being persecuted !!