Here's why:
* Aggression: Male guinea pigs can become aggressive towards their young, especially if they're stressed or feel their territory is being threatened.
* Mating: Female guinea pigs can become pregnant again almost immediately after giving birth. Keeping the father in the same cage could result in the mother getting pregnant again while still caring for the current litter.
* Stress: Having the father around can be stressful for the mother, especially if she's already feeling overwhelmed with caring for the babies. This stress can affect her milk production and overall well-being.
Exceptions:
* Experienced Breeders: Some experienced breeders may choose to leave the father with the mother and babies for a short period (typically a few days) if they're confident the father is non-aggressive and the mother is healthy.
* Large Enclosures: In very large enclosures, separating the father and mother can be done while still allowing them to interact through a barrier.
Important Note: Always err on the side of caution. If you're unsure, it's best to separate the father immediately.
For more information, consult a veterinarian or a reputable guinea pig breeder.