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