POWER OF ATTORNEY

For Executing Forms 3, 4, 5 and 144

   The undersigned hereby constitutes and
appoints each of 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 24th day of October, 2023.

/s/ Andrea Castetter
Andrea Castetter