Much to my displeasure, my (wife's) cat has torn up a large section (2'x6') of carpet. Eventually we would like to sell the house and this would definitely be noticed. Is there any way to repair the carpet or should I plan to sell the house with the damage as is, or replace the carpet in a single room which is likely to be a different color than the rest of the house.
Ah, the wonders of carpet ...
The answer is that you would be able to replace the carpet in that area, typically seamlessly, if you have more of the same carpet, such as remnants that the installers left in your attic or garage. If you don't have more of the SAME carpet -- as in, same batch, same manufacturing date, same everything -- then you will end up replacing the carpet, or giving the buyer an allowance to replace carpet as part of the closing/sale costs.