as wise as an owl
Yes.
It's not an idiom. Idioms make no sense unless you know the meaning already. "No end" means just what it looks like -- something is endless.
Wise Stores ended in 1995.
Sorry, there is no such idiom as "at wit's put end to". "at wit's end" means you have tried every possible way to solve a problem but cannot do it and do not know what to do next. "put and end to" means to stop or put a stop to something.
It's as wise as an owl.
The idiom of going to the dogs means that any person or thing has come to a bad end, been ruined, or looks terrible.
It's not an idiom. "Fruits" means the end result of something, so "fruits of labor" would be what you earned from hard work.
The idiom accompanies brief advice that the giver assumes that the recipient understands without supplying a lot of detail. The implication is that for a wise person, just a subtle hint will suffice to reveal what is intended.
It means complete and total frustration with a situation.
for days and days (Portuguese - dias a fio )
brush In the American South we say "dumb as a box of hair"
One idiom that refers to a reward is "the pot at the end of the rainbow".