The shares have been listed on the Nasdaq
National Market under the symbol "MWIV.

About MWI Veterinary Supply, Inc ."
PETCO's Chief Executive Officer James Myers said, "We have a long history
of supporting animal welfare and adoptions and we're broadening that
philosophy with our 'Think Adoption First ' program.

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MWI Veterinary Supply Announces Pricing of Initial Public Offering

ATLANTA, The Humane Society of the
United States (HSUS) today joined the nation's leading pet specialty retailer
PETCO Animal Supplies, Inc.5 million members and constituents.com
Petfinder.com is the nation's largest and oldest online adoption
community.

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PETCO store associates have received information on how to promote the
'Think Adoption First' philosophy so they can properly suggest adoption first
when customers express interest in adding a companion animal to their home. The HSUS protects all
animals through education, investigation, litigation, legislation, advocacy,
and fieldwork.

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00 per share." Banc of America Securities LLC
served as the book running manager and William Blair + Company, LLC and Piper
Jaffray + Co.

PETCO's adoption promotion program should
directly link people with animals in need and address the problems associated
with homeless animals, and we congratulate PETCO on developing this innovative
idea and aggressively implementing it."
At this week's HSUS Animal Care Expo, PETCO, the PETCO Foundation, and
Petfinder. It is on the web at hsus.org.

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acted as co-managers for the offering.
HSUS President and Chief Executive Officer Wayne Pacelle said, "We're
extremely pleased to showcase PETCO's 'Think Adoption First' program at our
annual Animal Care Expo conference.

About HSUS
The Humane Society of the United States is the nation's largest animal
protection organization with more than 8.

About PETCO (Nasdaq: PETC)
PETCO, established in 1965, is a leading specialty retailer of premium pet
food, supplies and services.

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HSUS PETCO Showcase 'Think Adoption First' at 'Animal Care Expo' Event With Leaders of U.S. Animal Welfare Community

PETCO's vision is to best promote, through its
people , the highest level of well being for companion animals, and to support
the human-animal bond. It operates over 730 stores in 47 states and the
District of Columbia and is a leading destination for on-line pet food and
supplies at http://www.

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MWI Veterinary Supply
has agreed to sell up to an additional 650,000 shares of common stock to the
underwriters to cover over-allotments, if any.

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com , the company's online partner, will encourage customers to
consider adoption as the first option when thinking about adding a new
companion animal to their homes. We will, simply put,
recommend adoption before purchase of any animal at our more than 730 stores
across the county. HSUS
opposes keeping all non-domesticated animals as pets.

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in announcing the retailer's 'Think Adoption
First ' program at the 14th annual 'Animal Care Expo' in Atlanta.

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(Nasdaq: MWIV) announced today the pricing of an initial public offering
of 4,333,334 shares of its common stock, all of which were offered by the
Company, at $ 17.com/cgi-bin/prnh/20030603/PETCOLOGO)
Through the 'Think Adoption First ' program, PETCO, the PETCO Foundation
and Petfinder. As part of the 'Think Adoption First' effort , PETCO, with
the help of Petfinder.

About Petfinder.5 million animals, making it the nation 's largest animal adoption
organization.

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This press release shall not constitute an offer to sell or the
solicitation of an offer to buy nor shall there be any sale of these
securities in any state in which such offer, solicitation or sale would be
unlawful prior to registration or qualification under the securities laws of
any such state. is a leading distributor of animal health
products to veterinarians across the United States. PETCO stores also offer for sale small mammal ,
reptiles and birds and as well as these species plus dogs and cats for
adoption in cooperation with animal shelters and rescue groups. Working with more than 8,500 active animal welfare organizations
across the country, Petfinder.com offers a searchable database of adoptable
companion animals .

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The products MWI sells include pharmaceuticals, vaccines,
parasiticides, diagnostics, capital equipment , supplies, veterinary pet food
and nutritional products. The goal of the
conference is to provide educational workshops and training on related animal
welfare topics and to exhibit the latest products and services for the animal
welfare industry.petco.

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newscom. Last year, Petfinder.

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:
MWI Veterinary Supply, Inc. MWI distributes more than
10,000 products from over 350 vendors to more than 14,000 veterinary practices
nationwide. Since its
inception in 1999, the PETCO Foundation, PETCO's non -profit organization, has
raised more than $22 million in support of more than 2,600 non-profit
grassroots animal welfare organizations around the nation.

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com's searchable database, will also reach out to
placement groups and shelters that offer small mammals, reptiles and birds for
adoption, in an effort to help find families for all homeless animals as well
as resources for customers interested in these species . PETCO will encourage
customers to seek adoptable animals in the community as a first option,
providing informational resource centers and in-store adoption opportunities
to a larger variety of rescue groups. The organization is based in Washington and has field
representatives across the country .

Identification services and products for all pets.

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(Logo: http://www.

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The non -profit HSUS is a mainstream voice for animals, with active programs in
companion animals and equine protection, wildlife and habitat protection,
animals in research and farm animals and sustainable agriculture.

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Over 1,300 grassroots animal welfare representatives from the animal care,
control , sheltering and rescue communities from all 50 states and 26 foreign
countries are in Atlanta this week attending the annual educational and
product exposition conference sponsored by the HSUS. Think Adoption First is the right thing to do, and we are
absolutely committed to making this work, to the benefit of adoptable animals
and our community animal welfare partners.

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The offering of these securities will be made only by means
of a prospectus, copies of which may be obtained by contacting Banc of America
Securities LLC, Capital Markets Operations (Prospectus Fulfillment), 100 W. PETCO does not sell dogs or cats, and for
nearly 40 years has worked with shelters to find homes for millions of
adoptable animals.com.

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com are encouraging animal welfare groups to join in the adoption
effort .com adoption partners found homes for
more than 1.

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MERIDIAN, Idaho, MWI Veterinary Supply,
Inc .
33rd Street, New York NY 10001 (646) 733-4166.