POWER OF ATTORNEY

For Executing Forms 3, 4, 5 and 144

       The undersigned hereby constitutes and appoints each of
 Andrea Castetter, Nicole McDaniel, Beth Taylor, and Brennan
 Freeman, signing singly, as the undersigned's true and lawful
 attorney-in-fact, for such period of time that the undersigned is
 required to file reports pursuant to Section 16(a) of the
 Securities Exchange Act of 1934, as amended (the "Exchange Act"),
 or Rule 144 of the Securities Act of 1933, as amended (the
 "Securities Act"), due to her affiliation with Inotiv, Inc., an
 Indiana corporation, unless earlier revoked by the undersigned in
 a signed writing delivered to the foregoing attorneys-in-fact,
 to:
1) execute for and on behalf of the undersigned Form ID, Forms
 3, 4, 5 and 144 and any amendments to previously filed
 forms in accordance with Section 16(a) of the Exchange Act
 or Rule 144 of the Securities Act and the rules thereunder;

2) do and perform any and all acts for and on behalf of the
 undersigned which may be necessary or desirable to complete
 the execution of any such Form ID, Forms 3, 4, 5 and 144
 and the timely filing of such form with the United States
 Securities and Exchange Commission and any other authority
 as required by law; and
3) take any other action of any type whatsoever in connection
 with the foregoing which, in the opinion of such attorney-
in-fact, may be of benefit to, in the best interest of or
 legally required by the undersigned, it being understood
 that the documents executed by such attorney-in-fact on
 behalf of the undersigned pursuant to this Power of
 Attorney shall be in such form and shall contain such terms
 and conditions as such attorney-in-fact may approve in her
 discretion.
       The undersigned hereby grants to each such attorney-in-fact
 full power and authority to do and perform all and every act and
 thing whatsoever requisite, necessary and proper to be done in
 the exercise of any of the rights and powers herein granted, as
 fully to all intents and purposes as the undersigned could do if
 personally present, with full power of substitution or
 revocation, hereby ratifying and confirming all that such
 attorney-in-fact, or her substitute or substitutes, shall
 lawfully do or cause to be done by virtue of this Power of
 Attorney and the rights and powers herein granted.  The
 undersigned acknowledges that the foregoing attorneys-in-fact, in
 serving in such capacity at the request of the undersigned, are
 not assuming any of the undersigned's responsibilities to comply
 with Section 16 of the Exchange Act or Rule 144 of the Securities
 Act.
        IN WITNESS WHEREOF, the undersigned has caused this Power
 of Attorney to be executed as of this 20th day of March, 2024.


       /s/ Michael Harrington