A heater has an effect on animal '''[[Animals#Mood|Mood]]''' (which is different than [[Animals#Friendship|Friendship]]) during the Winter when an animal is inside a barn or coop past 6PM, and the animal has 150 mood or above. Only a single heater is required to have an effect, additional heaters provide no additional benefit. | A heater has an effect on animal '''[[Animals#Mood|Mood]]''' (which is different than [[Animals#Friendship|Friendship]]) during the Winter when an animal is inside a barn or coop past 6PM, and the animal has 150 mood or above. Only a single heater is required to have an effect, additional heaters provide no additional benefit. |