What happens if dogs are crossbred?

Crossbreeding dogs may cause these issues. Breed traits are set by genes, so mixing breeds makes offspring traits unstable in size, looks, and behavior.

Different breeds have different temperaments, so crossbred pups may show over-activity, aggression, anxiety, or depression. Some breeds carry hereditary disease, so crossbreds may have congenital issues in eyes, breathing, heart, or joints.