I totally agree with this, Peggy was a lab rescue and had 4 homes before we took her on permanantly, people just couldn't put up with the constant following, naughty behaviour, baying, food stealing.
We knew it was going to be a long process with her and she's come on leaps and bounds but she still suffers terrible seperation anxiety and I haven't been able to return to work yet because of the noise and the neighbours but it's something we're still working on with her.