Dogs in
estrus often have difficulty concentrating on things.
Not exact matches
However, females mate more
often with high - ranking males closer to
estrus, increasing the chances that their offspring will inherit better genes.
For example, females experiencing
estrus urinate more
often than females not in heat.
They
often begin to develop between six and ten years of age and are caused by the hormone, progesterone, associated with
estrus, and reproduction.
Heat cycles (
estrus) lasts 6 to 12 days,
often twice a year in dogs and 6 to 7 days, three or more times a year, in cats.