The number of people giving up wolf-like dog breeds, such as Huskies and Malamutes, is increasing.
That is according to the Blue Cross, which has reported a five-fold increase in the number of Alaskan Malamutes being handed in over the first six months of this year compared to 2011.
It is thought that the numbers are increasing because people get these breeds without researching if the dog will fit in with their lifestyles.
Claire Stallard, Blue Cross animal behaviourist, says: "These beautiful and distinctive breeds have become fashionable over the years but unfortunately they may be chosen because of their looks alone.
"They require a considerable amount of exercise and, if you're not able to offer this, then you may find that you have one unhappy, bored and frustrated dog."
She added that people looking to take on these breeds need to have an active lifestyle, as these dogs have lots of energy. Huskies, for example, can pull sleds over miles of icy terrain.
Anyone looking to get a dog is urged to do lots of research before getting one in order to find a breed that will suit their lifestyle, Ms Stallard said.