I don't think it's a Lurcher thing particularly. It is extremely common in all breeds and crosses, as demonstrated by that TV programme that did a study on it.
Essentially dogs are social creatures and being left alone doesn't come naturally to them. Some cope better than others, purely down to life experience and personality etc, it's as simple as that really.
I have had to go out for longer than usual today - very unusual for me to leave him over an hour. He was quiet for the first 42 minutes, busied himself scoffing kongs and various other treats - then screamed for just over an hour and when I say screamed, I mean screamed.
He is just incredibly sensitive and anxious by nature and helping him is an ongoing process that will probably take his lifetime . It doesn't help that I don't drive, so can't take him with me when I go out, unless dh is home and can drive me. I start lesson next week though, so fingers crossed things will improve if I can pass my test.
Just been discussing it with dh and we know we (I say we, but basically it's down to me) are going to have to get back to making a concerted effort with a specific SA programme, so will be getting the books I linked to out again this weekend and putting together a programme. We've also agreed a wifi camera will be a big help with the process, so will price those up too. We currently have our caravan on the drive and I can pick up our wifi out there, so that will really help me to watch what he's up to and make sure I appear back in the house just before he goes over threshold.
Mine is in a car crate with our other Lurcher, we have the rear windows covered and they both just curl up and sleep when we leave them in there, but of course that's only an option in the winter really. We do have a long boot-bolt for iffy days, so I can visit friends and bolt the boot wide open on their drive so they have a direct cool breeze, but again it's still only possible on certain cool-ish days. Next plan is a custom built dog-gate and lockable tailgate guard from Barjo (both £££s unfortunately) so I can leave the boot completely up.
It really is very restrictive, I can't go to doctor's or hospital appointments or get my hair done etc unless I can get a dog-sitter and I've gone from someone who was out and about, for at least part of the day, 3-4 days out of 5, to someone that rarely goes out at all. My mum is a good dog-sitter, but she's not in the best of health these days, so I need to do something sooner rather than later to improve things. Ds2 is just about to leave primary school and we have all sorts of end of school things for me to attend, sports day, presentation day, y6 play, charity morning, leavers assembly etc, as well as dd's school sports day. If it was winter I could pop him in the car for an hour (we only live across the road from the school) but being summer I'm stuffed unless dh can take the morning off.