BUFFALO, N.Y. (WIVB) — The Buffalo Zoo’s Arctic Edge exhibit will soon no longer have its two gray wolves.

Timber and Willow came to the Zoo in September 2015 after being transferred from the New York State Zoo at Thompson Park in Watertown.

The siblings, who will be two years old in April, have had issues adjusting to their environment at the Buffalo Zoo, according to observations by keeper staff.

“We will always keep the best interests of the animals in mind,” said Buffalo Zoo President & CEO, Donna Fernandes, Ph.D. “We love the wolves, and like the public, we have enjoyed having them here, but we recognized the difficulties they were having and feel we have made the best choice for their overall comfort and well-being.”

The wolves will be transferred to the custody of another accredited member of the Association of Zoos and Aquariums (AZA). Officials say their new home will offer different accommodations that will better suit the wolves’ shyness and juvenile energy.

The wolves will leave the zoo on Wednesday.

In their place, zoo officials say they plan to modify the wolf enclosure and bring in arctic foxes, pending acquisition.

The foxes are more curious and social, according to zoo officials who say they think the animals will make a good addition to the Arctic Edge exhibit.