MCOA Members Page

Welcome Members

Thank you for taking this important step toward preserving the Mastiff breed. Information on this page is ONLY available to MCOA members.
Now in one convenient location, the MCOA Members Page includes important club news and updates, details on the Breeder Referral Listing, Castle Keeper Times, and the application forms for MCOA Futurity and Maturity and much more.
In addition, you will find essential information as it relates to your membership, including your membership renewal forms, payment processing for membership dues, and any other membership forms you may need.
Please bookmark this page in your browser as your one stop shop for your MCOA Membership.

The Mastiff Club of America requires its members to adhere to the following guidelines which constitute its Code of Ethics. The Club also requires that members, breeders and stud dog owners not aid or abet the violation of these guidelines by anyone else. The Club does not entertain contractual disputes as a part of its hearing process, but will determine if any additional actions should be taken, if such contractual disputes have been remedied by other parties, or institutions. This Code details certain practices necessary to implement the objectives of the Club as outlined in Article 1, Section 2 of its Constitution.
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The Mastiff is a large, massive, symmetrical dog with a well-knit frame. The impression is one of grandeur and dignity. Dogs are more massive throughout. Bitches should not be faulted for being somewhat smaller in all dimensions while maintaining a proportionally powerful structure. A good evaluation considers positive qualities of type and soundness with equal weight.
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MCOA Illustrated Mastiff Standard

There is evidence of Mastiff-like giant dogs dating back as far as 2500 BC in the mountains of Asia. Bas-reliefs from the Babylonian palace of Ashurbanipal (now on display in the British Museum) depict Mastiff-type dogs hunting lions in the desert near the Tigris River.
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The MCOA is happy to announce the new Breeder Referral program. Breeders who subscribe to the Breeder Referral program will have their name and contact information listed on the website, this will be an alphabetical list by state. Please see the MCOA Breeder Referral page on Facebook for more listing information through our Facebook page. Only Active MCOA members in good standing that have subscribed to the MCOA Breeder Referral List are allowed to post litter announcements. Please read the following before placing a listing.


A non-refundable payment of $25 must be paid to the MCOA prior to posting a litter announcement. Your payment will add your name to the Breeder Referral List that is maintained by the MCOA. This entitles you to post confirmed litter and birth announcements on this group that you are the Breeder or Co-Breeder on.
Please send your PayPal payment or mail your payment to:Mitzi Walters MCOA Treasurer 7652 Dublin Rd Dublin, OH 43017Please specify “Breeder Referral List” in the notes section of PayPal or on your check.


Comments/questions should be emailed to the social media committee at


1. Litter announcements may only be made by Active MCOA members in good standing, who have paid the required subscription fee. Co-breeders who are not MCOA members must have an asterisk (*) placed next to their name with the footnote: *Not an MCOA member.2. Only upcoming litters that have been confirmed and birth announcements are allowed. (Listings for Planned Breedings are not allowed.)3. The following are minimum requirements for each listing:- Breeder(s) full names* – Contact information – Litter location: city and state – Registered names and titles of sire and dam – Listings must be updated after puppies are born with date of birth and number of puppies by sex. (This information must be placed within the body of the original announcement within one week of birth.) Members are responsible for their own listings and are encouraged to update their posts so that information is kept as current as possible, e.g., number of puppies still available.*Co-breeders who are not MCOA members must have an asterisk (*) placed next to their name with the footnote: *Not an MCOA member.

Recommended listing information:

– Health testing / results of sire and dam (full disclosure.) – Health testing links to OFA4. Detailed puppy sale conversations, including pricing, are not allowed and must be discussed privately.5. Please delete your listing after all puppies are sold/placed. Breeder listings will be automatically deleted after 4 months unless special arrangements have been approved.6. The MCOA Social Media Committee has the right to post, update rules and requirements, and remove any information that is not allowed. Please read all rules carefully.7. Litter announcements will only be allowed by Active MCOA Breeder Referral List subscribers. No other posts will be approved.

Visit the MCOA Facebook Page for more info.

To view a list of all MCOA members and their contact information please email the membership secretary. 

The annual MCOA National Specialty Show


Clymer, NY


Kingsport, TN



MEmbers only


Castlekeeper Times

All 2019 Issues
To see all editions of the Castlekeepers Times newsletter, please click below


MCOA Breeder Referral

The MCOA is happy to announce the new Breeder Referral program. Breeders who subscribe to the Breeder Referral program will have their name and contact information listed on the website.

Join the MCOA Members Facebook Page

The official MCOA members group where members of the Mastiff Club of America can share information about the club and discuss topics of interest.


See up-coming specialty events, past specialty results, and the national archive of all past results.

National Specialty

2023 MCOA National Specialty

The Mastiff Club of America 2023 National Specialty will be held in Albuquerque, New Mexico at the Albuquerque Marriott Pyramid North May 15-20. Hosted by Five Star Mastiff Club.

National winners

2022 Specialty Results

Congratulations to the 2022 MCOA National Specialty winners.

National archive

Past specialty winners

View the Mastiff Club of America national archive of past Best of Breed and Best of Opposite national specialty winners.


Years Incorporated




AKC Registered Mastiffs 2018


National Specialties

Shop with mcoa

The MCOA Charitable Trustees and the MCOA Health Committee volunteers have been working on fundraising events and opportunities to bring in revenue to meet our current and future financial obligations related to Mastiff Health. You can help us in this effort by making a direct donation or by shopping with MCOA.

A beautiful Mastiff head keychain. Stainless steel.
Mastiff earings in your choice of either stainless steel, or gold plated.
4 Mastiffs (gold, rose gold, silver, and gunmetal) on a heart-shaped keychain.
Necklace with Mastiff PendantChain length: 18″ with 2″ extensionPendant: 1.5″ tall x 5/8″ wide

Mastiff Health Related Articles



The Mastiff Club of America’s DNA Sub-Committee promotes the use of DNA to insure the integrity of our Mastiff pedigrees and to …



Cystinuria is an inherited metabolic disorder that can cause stones to form in the kidneys and urinary tract of affected individuals. It has been found in over…

Cystinuria in Mastiffs


The MCOA Cystinuria Committee recommends screening Mastiffs for Cystinuria between 18 and 24 months…


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