* Horse genetics are complex: Horse breeding is not a simple matter of mixing traits. There are many genes involved in determining a horse's appearance, temperament, and abilities. These genes interact in complex ways, making it impossible to accurately predict the outcome of a crossbreed.
* Dominance and Recessiveness: Certain traits are dominant, meaning they are more likely to be expressed in offspring, while others are recessive, meaning they may only be expressed if two copies of the recessive gene are present.
* Incomplete Dominance and Codominance: Some traits don't follow simple dominant/recessive patterns. This makes predicting offspring traits even more complex.
* Environmental Factors: A horse's environment also plays a role in how its genetics are expressed.
Instead of relying on calculators:
* Consult with a knowledgeable breeder: A reputable breeder can provide guidance based on their experience and understanding of horse genetics.
* Research pedigrees: Understanding the lineage of both parents can help you predict potential traits and issues.
* Learn about horse genetics: Take the time to educate yourself on the basics of horse genetics to make more informed decisions.
Remember, breeding horses is a complex process that requires careful planning and consideration. While calculators may be helpful for general information, they cannot replace the knowledge and experience of a qualified breeder.