dont think im being funny mate , as i have a theory , well my dog a german shepherd is out the back with the birds when they are out every time , and i have never had a hawk strike at the loft , but my pal down the road about 400yrds gets hit all the time WHY? he has not got a dog ,a friend across the water in alexandria club had a jack russell dog in his compound for years no hawk strikes in all that time, it had to get put down and within 2/3 weeks he had a bird killed by a sparrowhawk, i think the hawk comes past to survey they area and see's the dog and thinks hey if i hit one of those doo's and land in that garden that dog might get me and does'nt bother and goes to an easier prey, just my theory.