It depends on the defect, post new question with more detail.
silver content in 1867-1967 Canadian quarter
All 1967 US quarter dollars have the eagle upside down.
25 cent.
The coins are face value and have no silver.
The 1967 quarter has a bobcat on it, not a cougar. So many were issued that unless it's in uncirculated condition, it isn't worth much more than face value. An uncirculated quarter sells for about $7
If it is uncirculated it will be worth more than face value but if it is circulated it will be worth 25 cents.
US coins dated 1965-1967 don't carry mint marks, so it's not possible to tell where your quarter was minted. In circulated condition it has no added value -- there is no silver in it. A nice uncirculated one is worth about 50 cents.
The Canadian quarter is worth a price ranging from $8 to $10 each. The exact price will depend upon the condition of the coin.
A 1967 Washington quarter has no silver and is face value.
All of the quarters struck for circulation from 1965 to date are just quarters.
The 1967 Washington quarter has no silver and is still in circulation, the coin is face value.
That's the Canadian centennial quarter, currently worth about $5 for the silver.