#228 Vuelven siempre muertas porque cuando las mandas a pelear, desgastan toda su vida para ganar experiencia.
Cito la wiki:
You can engage your pets in battles against enemies, allowing them to gain experience and enhance their stats over time.
The duration of a pet's battle is influenced by its health and stats. A pet will only return to your character after its health is depleted. Additionally, the length of the time your pet is away is negatively affected if the pet is sent while hungry, unhappy, or with diminished health.
The experience gained from battles varies based on the location where the pet is fighting. Locations with stronger enemies provide a higher rate of experience per second for the pet.
When a pet returns from battle, it automatically goes back to the location where it was fighting. If you are not present at that location when the pet returns, you will not be able to interact with it until you travel to that specific location.