Petco Text Logo
Petco Pet Logo

My KC registered dog is too big. Are his breed papers fake?

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Male | unneutered | 7 months and 13 days old

He's kc reg but why is he so big? My friend has a chihuahua that's 1 quarter Jack Russell and she's smaller than him she's 3 months younger but shouldn't she be the bigger dog since she's part Jack Russell idk do u think he's a little on the big side for his age btw he's 8 months old not 7 do u think his papers are fake how can I tell if they are

1 Answer

Most Helpful Answer

Image profile

Answered By Jeffrey Milner

Veterinarian

Published on May 14th, 2017

If you have any doubt as to the validity of your dog's breed, there are companies available that perform canine DNA testing. The testing provides information as to the lineage and breeds that make up your dog. There are several companies that do this, all ranging in price, detail, and reputability. Beyond this, there is no positive way to identify Marley's breed without question. If you do find out Marley is not pure bred but the papers say otherwise, I would definitely confront the breeder or pet store from which you acquired him with the new found information.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored