02/20/2026
Shared from Majestic Mountain Yorkies
It’s been a few days since I have posted I have been wanting to address this topic in a tasteful & respectful way so 🧬 Let’s Talk Genetics & Size in Yorkshire Terriers 🐾
I’ve recently seen conversations about breeding smaller females to small males in hopes of producing “smaller/Tiny” puppies. I want to gently educate on why genetics simply do not work that way.
Many assume:
Small female + small male = tiny puppies
But size is a polygenic trait, meaning it’s influenced by multiple genes — not just what you see in the two dogs standing in front of you.
A male may be 4 pounds, but if he comes from 6–7 pound lines, he still carries those genetics. Those genes can absolutely show up in his puppies.
According to the American Kennel Club( Not that every breeder likes or agrees with them) , the Yorkshire Terrier standard is up to 7 pounds, with most well-bred, structurally sound adults falling between 5–7 pounds.
When breeders intentionally pair very small females with the goal of producing even smaller puppies, it can create serious risks:
• A small female has a smaller pelvic canal
• Puppies may inherit larger structure from previous generations
• This can result in difficulty whelping
• Emergency C-sections become more likely
• Puppies may not survive delivery
• Mothers can experience post-surgical complications
• In some heartbreaking cases, the mom is lost days after surgery
Breeding is intentional. We plan heats, we select pairings, we market these puppies. Because of that, we carry the responsibility to prioritize structure, lineage consistency, and maternal safety over marketing terms like “micro” or “teacup.”
A truly small line shows consistency across generations — not just one small individual.
Ethical breeding means:
✔️ Evaluating parent, grandparent, and littermate size
✔️ Considering bone structure and head size
✔️ Reviewing past whelping history, if female has produced litter previously
✔️ Health testing
✔️ Preserving breed.
It is not about producing the smallest puppy possible.
It is about producing healthy mothers, safe deliveries, and structurally sound puppies that live long, full lives.
Research. Responsibility. Preservation.
Our dogs deserve nothing less. 💛
If you have made it this far, please feel free to share.