Thanks Iam. I've resigned myself to not getting another dog (for various reasons - not because of shelters!) but my daughter had no end of problems trying to adopt. She is a fab dog 'mum', and has given her dog (from a breeder) a great home, but was refused by a rescue centre because she and her partner both worked. They arranged their days in the office so they don't coincide, and the dog is not left on his own, but this wasn't taken into consideration. They don't have a large garden, which also counted against them, but they live near a canal, where the dog gets two walks a day.
When our last dog died we were given the runaround by a rescue centre too. They seemed to think that if we were serious about getting a dog we should be happy with any age, breed and sex, but it doesn't work like that. After one particularly disappointing experience when we were led to believe we could start the process with a puppy we'd fallen for, only to find that he was in the final stages of adoption with another family, we gave up.
It might be that not all rescue centres are the same, but these were in different areas entirely, and we both had negative experiences, as has the friend who sent me the meme.