Both "fenced-in" and "fenced in" seem to be correct, so it is up to you to decide which one looks better in your particular writing situation. Personally, I would use the hyphenated version.
It is not hyphenated.
No it's not hyphenated.
Motorcycle is not hyphenated
words are only hyphenated when they have a separate meaning when separated than they do when hyphenated
Yes it should be hyphenated.
No, "hardworking" is not hyphenated.
It can be. Some words can be seen both hyphenated and non-hyphenated.
No. Well above is not hyphenated.
Yes it should be hyphenated.
The word desperate hyphenated
peace of mind is not hyphenated.
"Field" is not hyphenated.