Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

None.

Disclosure Controls and Procedures

An evaluation was carried out under the supervision and with the participation of the company's management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934). Based upon that evaluation as of December 31, 2019, the company's Chief Executive Officer and Chief Financial Officer concluded that the company's disclosure controls and procedures are effective at a reasonable level of assurance in alerting them in a timely manner to material information required to be disclosed in our periodic reports filed with the SEC.

Management's Report on Internal Control over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined under Rule 13a-15(f) and 15d-15(f) of the Securities Exchange Act of 1934. Under the supervision and with the participation of management, including the company's Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our evaluation under the framework in Internal Control - Integrated Framework, our management concluded that our internal control over financial reporting was effective as of December 31, 2019. The effectiveness of our internal control over financial reporting as of December 31, 2019, has been audited by KPMG LLP, an independent registered public accounting firm, as stated in its report included herein.

Changes in Internal Control over Financial Reporting

On July 31, 2018, the company completed the acquisition of Abaxis, Inc. (Abaxis). In our 2018 Annual Report on Form 10-K, we excluded Abaxis from our evaluation of internal control over financial reporting. Since the acquisition, Zoetis has extended its oversight and monitoring processes that support our internal control over financial reporting, as well as its disclosure controls and procedures, and we continue to integrate the acquired operations of Abaxis. Beginning with the third quarter of fiscal year 2019, we included the internal controls of Abaxis in our assessment of the effectiveness of Zoetis’ internal controls over financial reporting. Except for the addition of internal control over financial reporting relating to the integration of Abaxis, there has not been any change in our internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934) that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.