oriental rugs

Our cat always used to walk on our oriental rugs and would sit on the furniture.  Now, he only will walk on the hard wood floors and avoids the carpet and never sits on the furniture any more.  Why all of a sudden is he doing this? He is an older male cat that we took in as a stray 6 yrs ago.

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I am looking at the First Defense product to help us deal with a flea problem.  Our house is mostly hardwood floors, but we also have wall-to-wall carpets and rugs, including oriental rugs.  I’d like to know whether the product can cause any damage to carpets or rugs, and whether it will leave any visible trace or residue on any of them, including ones with dark colors.  Also, can you tell me whether the product lasts as long on woven rugs, which are not as thick and don’t have the same texture.

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