Enhanced Animal Breeding, Health & Milk Yield

This overhaul adds more realistic animal breeding, health, aging, and milk production.

• Animals can have both male and female offspring. The number of offspring varies by breed.
• Breeding can be started manually or automatically. Male animals may initiate it automatically. Breeding not initiated by a male animal incurs a per-animal fee that varies by breed.
• Successful breeding depends on the animal's age and the time elapsed since its previous birth.
• Cows follow a lactation cycle: They are dry for two months before calving. After calving, they produce more milk and consume more grain, with both gradually diminishing. If milk production stops for an extended period, it may cease altogether.
• Animals can live beyond 60 months. Their health declines when they are unwell and deteriorates further as they reach maximum age.
• Overcrowding reduces animal health, and reproduction may result in more animals being kept in a stable than its intended capacity.

Based on the original animal system by Chissel.