* Genetics: Size is largely determined by genetics. While a sire can pass on genes for larger size, the dam's genetics also play a significant role.
* Breed Standards: Most toy breeds have specific size standards. Breeders strive to produce dogs within these standards, meaning the sire and dam are usually similar in size.
* Health Considerations: A significant size difference between sire and dam can lead to complications during pregnancy and delivery. The dam may have difficulty carrying and birthing larger pups, potentially leading to health issues for both mother and offspring.
* Breeding Ethics: Responsible breeders prioritize the health and well-being of the dogs. They avoid extreme size discrepancies between breeding pairs to minimize potential risks.
However, there are some exceptions:
* Individual Variation: Within a breed, there can be natural variation in size. A sire might be at the upper end of the size range while a dam might be at the lower end, leading to a small size difference.
* Mixed Breeding: In mixed breed situations, size can be less predictable, and it's more likely that a sire might be bigger than the dam.
Overall: While it's possible for a toy sire to be larger than the dam, it's not the ideal scenario. Responsible breeders aim for size compatibility between breeding pairs to promote healthy pregnancies and offspring.