k. That's what I thought. Now I have a new question. My ID L was sick and had a suitcase next to it. I quickly went to the clover icon and clicked it. He went out back with his pet and there were flowers with Japanese letters on it. Then he went back inside and was fine. What happend?
A more detailed explanation could be this:
Your character got sick, but was neglected for a longer time and he starts preparing to run away. You have activated the clover icon just in time to catch him leaving, which plants flowers outside the garden with the letters ごめんね, which means "I'm sorry" in Japanese.
That means you have successfully "reconciled" with you character.
If you have left him for further long, he could've completely ran away and all you'll get is a goodbye note and you'll need to hatch a new egg again and start over from Generation 1.
This only happens to adults - they run away. If they're younger (toddler or teen), they will instead die of neglect.