We have a 14 month old rescue who we've had for 10 months. Until about Easter she was fine, loved walks, seemed happy etc. Since then she refuses to go on walks at all. Is fine in the garden but won't entertain going out further. We can occasionally get her out to walk for 5 or 10 minutes if we drive somewhere and she loves being in the car but she just refuses to walk generally. She adores other dogs and loves to play with them.
She was found outside the rescue when she was newborn and so she didn't have any bad experiences that we know of. She was fine with everything when we got her, it was around Halloween and she didn't blink at fireworks etc.
The only thing DH can pin it to is the noise of the bin lorry when he took her for a walk one morning. It hadn't bothered her up till then but that seemed to be a factor.
We're away at the moment and have run out of ideas. We'll take her to the vet when we get back but we wondered if there was anything else we could try that aren't the usual things we've tried already. We love her to bits but she seems so sad at the moment.