Female Guinea Pigs:
* Increased vocalizations: They become more vocal, squeaking, chirping, or even making "pop" sounds.
* Restlessness: They show increased activity, pacing, and running around their enclosure.
* Aggression: They may be more aggressive towards other guinea pigs, even their usual cagemates. This can include nipping, biting, or mounting.
* Mount other guinea pigs: Female guinea pigs in heat might mount other females, even though they can't breed with them.
* Increased urination: This can be due to increased hormone levels.
* Discharge: You might see a clear or slightly pink discharge from their vulva.
* "Wiggling" their rear: This is a common sign of being in heat, as it helps to attract males.
Male Guinea Pigs:
* Increased activity: Males become more active and energetic.
* Increased scent marking: They'll spray urine more often to mark their territory and attract females.
* Mounting: They'll attempt to mount female guinea pigs, even if they're not receptive.
* Aggression towards other males: Competition for females can make males more aggressive towards other males.
Important notes:
* Heat cycles: Guinea pigs can enter heat every 14-16 days, although the exact duration can vary.
* Duration of heat: They can stay in heat for a few days, but the period of fertility is much shorter.
* Pregnancy: If a female guinea pig is mated, she can become pregnant.
* Spaying and neutering: If you don't plan to breed your guinea pigs, consider spaying or neutering them to prevent unwanted pregnancies and hormonal behavior.
Remember, if you notice any unusual behavior in your guinea pig, especially aggression or changes in vocalizations, it's important to consult a veterinarian. They can help you determine the cause and provide appropriate care.