Overview: Owners of female Chihuahua are very worried about the heat cycle because there are multiple physical as well as behavioral change takes place. Heat cycle also called estrous cycle in which eggs are discharged from ovaries and it gets accessible to mating. If there is no pairing occur and Chihuahua expect nothing then uterus will shed lining that produce different level of tissue and blood release from vulva.
When Chihuahua experience its first heat? Normally, the first heat occur at the age of 4 to 7 months old Chihuahua. After getting first heat cycle, the female Chihuahua enters in the phase of puberty. If your Chihuahua does not have first cycle at the age of 12 months then you must visit veterinarian.
What is the duration of heat? It is different in every dog. Heat cycle consist of different stages. It may undergo heat cycle from 5 days to 3 weeks. There are four stages of heat:
- Proestrus: The duration of this stage is 1 week but it may vary from 5 days to 8 days. At this stage the female is preparing for pregnancy.
- Estrus: It is the second stage of the cycle that is also called standing heat that lasts 5 days to 3 weeks. At this stage, the progesterone level rise and estrogen fails.
- Diestrus: At this stage, the hormone level start to normalize and blood discharge will slow down then stop. The female Chihuahua show a nesting behavior during this phase.
- Anestrus: This is known as a resting phase that is quite negligible phase and difficult to notice. At this stage, female Chihuahua prepare itself for the next heat cycle.
How often female dog enters heat: Usually heat occurs after every 5 to 8 months. Roughly 2 times per year, the female Chihuahua experience heat. At the age of 12 years, the dog heat will become very predictable.