>> he's definitely part of the family. >> reporter: max is 28 years old. that's 196 in dog years. and owner janelle derouen says that makes him the oldest dog in the world. she's tried seseveral times ove the years to get him in th guinness book of world records but hasn't had much luck. >>ut i haven't gotten any reply back as of yet. i don't know what they're waiting for. but max is the world's oldest dog. >> reporter: the title of the world's oldest dog used to belong to a 21-year-old dachshshd named chanel. she has since died. derouen has sent max's birth certificate and vet records to guinness and she wants his proper title. >> everything has been documented, notarized. so i'm just waiting to hear something because i don't want him to pass not being recognized. >> reporter: derouen plala to stop pursuing this if guinness doesn't respond soon. she wantnts max to enjoy his li

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