| Lastname | Firstname | Casefile | Photos | Case Status | Other crimes | State | City/Town | Country | Date | |
| Zak, Jr. | Michael | shot & killed herons, ospreys & 1 bald eagle on hatchery grounds | Convicted | MA | Sanderson | USA | 05/12/2006 | |||
| Zales | Connie Givens | neglect of 12 animals | Alleged | FL | Panama City | USA | 06/11/2003 | |||
| Zalsman | Karen | 96 farm animals seized | Alleged | MI | Nunica | USA | 03/28/1995 | |||
| Zamora | Gerardo | Stoned a dog to death | Convicted | TX | Harlingen | USA | 09/12/1997 | |||
| Zamora | Patrick | Cockfighting | Acquitted | CA | Sacramento | USA | 07/26/1997 | |||
| Zampatti | Roger | dogs left to starve to death, others found dead | Yes | Alleged | illegal drugs | CA | Mad River | USA | 08/11/2006 | |
| Zarate | Fernando Franco | Cockfighting | Alleged | OK | Oklahoma City | USA | 01/29/2004 | |||
| Zarate | Juan Ausencio | Cockfighting | Alleged | OK | Oklahoma City | USA | 01/29/2004 | |||
| Zarate | Mary Esther | Cockfighting | Alleged | OK | Oklahoma City | USA | 01/29/2004 | |||
| Zarling | Vernon Leroy | 3 dead donkeys, 1 dead horse found | Alleged | MN | Quincy | USA | 03/24/2008 | |||
| Zaterka | Peter | Beat a friend's pitbull | Alleged | CT | South Windsor | USA | 06/06/2002 | |||
| Zavala | Arturo Morales | cockfighting - throwing dead roosters into neighbors yard, 18 roosters, 8 hens seized | Alleged | WA | Wenatchee | USA | 07/07/2008 | |||
| Zavala | Benny | Starved and dissected pet guinea pig | Convicted | CA | Oxnard | USA | 09/00/2001 | |||
| Zavala-Martinez | Enrique | cut the ears of his nephews dogs | Convicted | AR | Springdale | USA | 06/02/2006 | |||
| Zawistowski | Katonya | Horse neglect | Convicted | WA | Pierce County | USA | 05/00/2001 | |||
| Zawistowski | Vern | Horse neglect | Convicted | WA | Pierce County | USA | 05/00/2001 | |||
| Zazueta | Marco Anthony | dogfighting suspected from former service officer | Open | CA | Desert Hot Springs | USA | 08/31/2007 | |||
| Zdan | Karen | Animal Cruelty | Alleged | NY | Worcester | USA | 03/00/2004 | |||
| Zduniewicz | Adam | 240 dead animals found at feedstore | Alleged | TX | Dalworthington Gardens | USA | 04/29/2009 | |||
| Zedler | Bruno | illegal big game hunt, guiding without a license | Alleged | AK | Lake Clark National Park & Preserve | USA | 09/00/1986 | |||
| Zeglin | Dennis | parrot shot to death | Alleged | NJ | Randolph | USA | 06/07/2009 | |||
| Zeh | Jo Ann | 22 cats seized | Alleged | Hoarding, probation violation | OR | Eugene | USA | 11/07/2007 | ||
| Zeh | Jo Ann | 50 cats seized | Convicted | Hoarding, probation violation | OR | Eugene | USA | 09/00/2006 | ||
| Zehr, DVM | Daniel Raymond | Veterinarian/Staff Misconduct violations and animal cruelty | Dismissed | IN | Munster | USA | 05/18/1993 | |||
| Zeller | Donald Joe | sexual contact with a dog | Not charged | child pornography | WA | Longview | USA | 07/23/2008 | ||
| Zeller | Tony | killing wolves from an airplane, taking game out of season | Convicted | AK | McGrath | USA | 03/20/2004 | |||
| Zhang | Bao Quilang | beat a dog to death | Alleged | Aibonito | Puerto Rico | 04/15/2008 | ||||
| Zhdanov | Oleg | beat his dog to death | Convicted | animal cruelty | NY | New York | USA | 00/00/2005 | ||
| Zhdanov | Oleg | owning 2 exotic cats, probation violation | yes | Convicted | drug abuse | NY | New York | USA | 08/06/2007 | |
| Zielinski | Christopher P. | arson fire killed several pets | Alleged | malicious destruction of property | MA | Haverhill | USA | 07/01/2002 | ||
| Ziemann | Cheryl | neglect of a horse, resulting in euthanasia | Convicted | NE | Pender | USA | 06/23/2003 | |||
| Ziemann | Cheryl | neglect of 2 horses | Convicted | NE | Pender | USA | 07/08/2003 | |||
| Ziemann | Cheryl | neglect of puppies & kittens | Convicted | NE | Pender | USA | 00/00/1991 | |||
| Ziemer | Michelle A. | home condemned after discover of dozens of animals, 1 dog found dead | Alleged | child endangerment | NE | Norfolk | USA | 02/10/2009 | ||
| Zillmer | Dan | 39 ill cats, kittens seized | Alleged | WI | Janesville | USA | 02/08/2001 | |||
| Zillmer | Jeannine | 39 ill cats, kittens seized | Alleged | WI | Janesville | USA | 02/08/2001 | |||
| Zillmer | Peggy | 39 ill cats, kittens seized | Alleged | WI | Janesville | USA | 02/08/2001 | |||
| Zimmerman | Elmer H. | shot 80 dogs to death rather than seek medical treatment at A&J and E&A Kennels | Civil Suit | PA | Kutztown | USA | 07/24/2008 | |||
| Zimmerman | Erik Robert | Beating, shooting, skinning and eating a raccoon | Yes | Convicted | GA | Athens | USA | 12/12/2003 | ||
| Zimmerman | Ervin | 18 sick dogs seized from squalor | Convicted | PA | Ephrata | USA | 11/02/2007 | |||
| Zimmerman | Frank | Fort Bills soldier stomps to death 1 dog, breaks leg of another | Alleged | TX | El Paso | USA | 03/15/2009 | |||
| Zimmerman | Mark | 90 puppies seized from owner of Missy's Puppy Land | yes | Open | MA | Randolph | USA | 06/29/2008 | ||
| Zimmerman, Jr. | Ammon H. | shot 80 dogs to death rather than seek medical treatment at A&J and E&A Kennels | Civil Suit | PA | Kutztown | USA | 07/24/2008 | |||
| Ziniuk | Jack Mark | horse struck in the head with a sledgehammer, decapitated | yes | Alleged | false reporting | CA | Anza | USA | 04/19/2009 | |
| Ziniuk | Jack Mark | operating a kennel without a license | yes | Convicted | animal cruelty | CA | Lancaster | USA | 12/00/1988 | |
| Ziniuk | Jack Mark | animal cruelty to kennel dogs | yes | Convicted | CA | Sun Valley | USA | 00/00/1986 | ||
| Zobel | William A. | 131 horses seized | Convicted | MO | Republic | USA | 01/08/2005 | |||
| Zochios | Alexandra | teaching assistant starved her elderly mothers dog to death | yes | Convicted | South Woodford | England | 11/06/2007 | |||
| Zubik | Robert Allen | 60+ animals neglected, 2 dead | Alleged | IN | Lake Station | USA | 05/01/2006 | |||
| Zuliani | Marcio | Beat dog with belt over 50 times | Convicted | CA | San Diego | USA | 03/00/2001 | |||
| Zurick | Maxx | Teen shoot four cows – one nursing calf perishes | yes | Alleged | FL | Indiantown | USA | 06/08/2006 | ||
| Zych, III | Joseph | dog stabbed to death | yes | Alleged | Failure to comply | IN | Valparaiso | USA | 06/22/2008 | |