He has been living at the RSPCA for "20 months too long" - and is desperately searching for somebody to take him home.
Greyson, a smooth-haired dachshund, has spent his entire life at the RSPCA's Newport Animal Centre after his pregnant mum was taken into their care.
The one-year-old has been described as a popular dog who "really enjoys playing with squeaky toys and having many cuddles from his carer".
A statement reads: "He cannot resist tasty treats, so works well for his training.
"Grayson has become quite popular here at the centre, he has many doggy companions that he regularly goes off lead in our paddock area.
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"He is unsure of new places and strangers therefore wears a muzzle on walks and when he goes to see the vet."
Grayson could live with a friendly, confident dog who he can learn from. He would thrive with a family that are home most of the day to help him settle and get him into his new home routine.
"Due to Grayson being shy of strangers he ideally needs an adult-only home and a cat free environment.," the statement adds.
"Unfortunately, due to an ongoing case he has been here 20 months too long. Now he is ready to find his forever home, and we are so excited for him."
The RSPCA is urging people to adopt an animal in need rather than turning to breeders when wanting to welcome a pet into their family.
"While it may be easy to find animals on the internet or even spend hundreds on an expensive breeder, you could risk heartache or huge vet's bills if you don't do your homework," a statement reads.
"By adopting and not shopping you'll also feel good for doing good - by giving an animal a second chance at life in a loving home.
"Plus, adopting from us means that you can relax knowing that all our animals are healthy, neutered, vaccinated and microchipped.
"As with all the animals we rehome, we'll pass on the details of their behaviour and veterinary treatment. You'll likely know more about your rescue animal's history than if you were to buy an animal online!
"We've taken the time to get to know each animal as an individual, to understand their likes and dislikes and to prepare them for life in a loving family, which means there are less likely to be nasty surprises when you get home.
"When you adopt a cat or a dog from one of our centres, you'll also get four weeks free pet insurance, which is vital to protect your pet's future as well as your bank balance! There's so much to gain from rescuing an animal in need."
If you're interested in rehoming Grayson, or any other dogs at the RSPCA's Newport Animal Centre, contact their team on 0300 123 0744 or email them via newport@rspca.org.uk.
Do you have a dog story to share? Email paige.freshwater@reachplc.com.
