I am loving your photos, the dog in the last one looks very much like one of my dogs. Saluki-x

I must have had 7 rescue dogs in the past, all got to a nice old age, still got 2 of them now.
I would always go back to rescue if I wanted another dog.

This may be an impossible question to answer as every dog is different, but would a dog who has spent time in a dog shelter be more tolerant of other dogs compared to one who has lived alone?

Eg my cousin had a dog from a puppy and never bothered training or socialising it and it would go crazy when it saw another dog, as well as other people, so it became uncontrollable. The dogs in the shelter have their own pen but they can see each other and see the fenced off exercise area so would they be more socialble than a dog thats never really seen other dogs much?

Weve done a bit of research and found out about a local dog training thing where you take your dog and its run in a hall with other people and their dogs. If we were to get a dog we would look into it more, but would they allow adult rescue dogs or is this a thing that only puppies would go to?

Having had several rescue dogs and cats, I`d always go down that route rather than line breeders pockets.
we lost our beautiful retriever/setter cross over 4 years ago and it was a nightmare not having a reason to get up early and although we had numerous cats the house seemed empty. Amazingly within a couple of weeks we were contacted by Retriever rescue who had a dog and a bitch that had to be homed together and were 8 yrs and 10 yrs old. we took them on and just lost Bonnie in November 2011 at 14 1/2 yrs old , so she had 4 good years with us and Sascha the boy is still going and due to make 13 shortly. We also now ( for company for Sascha) have a 4 yr old yellow lab and 3 yr old black lab, both rescues not to mention 5 cats in total , 3 of which are rescues!!
Whilst most rescue centres are full of Staffies at the moment I`d have to say a lot of that is down to irresponsible owners as all the staffies I know are well behaved, if a little boisterous and love everyone..
Do your homework regarding the breed your thinking of and register with a rescue centre.....