advice please - we have 2 new kittens and have tried to kitten proof the house as much as possible. However they do love to sit on the dining room chairs under the table. The trouble is they are leather upholstered and they are scratching them when they are in their lively mood! Today we put a sheet over them but now they love going under their even more - it hangs down like a hammock! They have spent more time under there today then ever before! I know kittens need their safe place but how do I stop them sitting on the chairs without scratching them to pieces??? I don't want to spend my entire eve shouting at them to get off?? ANy ideas?