Blue healthbar?

alpha 20 blue health bar what does it mean

I think that means that the Hearthling is recovering from being incapacitated.\

Check out the “desktop tuesday” episode if you have not already. It talks about the rescue feature:

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@illdred is correct. When hearthlings are on that recuperating from incapacitation state with the blue heart, their hunger and sleepiness will be frozen, so you don’t need to worry about that.

Once the blue heart changes to a normal heart, the hunger and sleepiness return to work like normal.