Hello & Welcome, UniLife! Depression does not require a significant trauma or obvious cause. Some of the symptoms you describe (change in mood, neither sad nor happy, lack of motivation over the course of time, spontaneous crying, etc.) are things you should discuss with a medical professional. It might be
- depression
- some other illness
- depression and some other illness
- "adjustment" issues
- nothing of long-term significance
Again, welcome!
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My dog
mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.