“Inflation in the cost of veterinary care and other factors have led to recent underwriting changes and plan availability in some states—difficult actions that are necessary to ensure a financially sustainable future for our pet insurance line of business,” said a statement from the company.

Impacted policyholders will be notified in writing.

The firm insures more than 1 million pets and is the first pet health insurance provider in the U.S. It said it has paid billions of dollars in claims over the last 40 years.

“Given the current environment, our rates will continue to be fair and appropriately priced for the plan, pet, and breed,” Nationwide Pet said. “We are making these tough decisions now so that we can continue to be here for even more pets in the future.”

Nationwide Pet said it will continue to expand its distribution network withy new partnerships as well as the established relationships it has with Walmart, Petco, and Unum—announced early this month.

Also earlier this month, about a week prior to this decision to reduce its pet insurance policy count, Nationwide Pet announced Joel Carnes as chief pet officer. Carnes served as vice president of Nationwide Pet’s operational excellence team for the past two years.

In other recent pet insurance news, Chubb in April said it acquired managing general agent Healthy Paws from Aon plc. Chubb had been the exclusive underwriter of Healthy Paws’ pet insurance program for Aon since 2013.

This article was originally published by Insurance Journal. Reporter Chad Hemenway is the national editor of Insurance Journal