If you’ve reviewed the parent club’s recommended Manchester Terrier health tests, you may have noticed some differences between the two varieties: Standard and Toy. This often raises the question—why are there differences if they are technically the same breed and can be interbred?

When comparing the health tests, the lists are almost identical, with one notable exception: the congenital deafness test, which is only emphasized for Standard Manchester Terriers. The primary difference lies in the emphasis placed on specific tests, which are categorized as either required or recommended, depending on the variety. However, it’s important to note that all the health issues listed can appear in both Standard and Toy Manchester Terriers.

Just as certain breeding lines within a breed may have predispositions toward specific traits, they can also be more susceptible to particular genetic mutations. In the United States, the development of the Toy and Standard varieties has followed a path similar to two distinct breeding lines within the same breed. The health test recommendations are designed to guide breeders in making informed decisions about which tests to prioritize.

A common question I get from breeders is: “What health tests should I perform if I’m breeding a Standard Manchester from Toy Manchester parents? Should I test for congenital deafness?” My response is, unless deafness is known to be a concern in their breeding line, testing for it may not be necessary. Aside from this, the comprehensive list of health tests remains the same for both varieties.

In conclusion, the list of required health tests serves as the minimum standard for both Standard and Toy Manchester Terriers. Following these guidelines can help ensure the health and longevity of the breed, regardless of the variety.

Learn more about Manchester Terrier health testing in a recorded seminar Michelle created to educate breeders and puppy buyers who want to know what health tests to ask about.

Did you know all Maximal Manchester Terrier puppies go home with a lifetime health guarantee? Read more.