Dear Tabby: My kitten is almost 6 months old and she is always misbehaving. What can I do? She jumps up on the dining room table, kitchen counters, bathroom counters and a second- floor ledge, which she is not supposed to be on. What can I do? Dear Kitten Owner: I wouldn't say your kitten is misbehaving. Leaping to high spots is instinctive behavior in a cat. There are items on the market designed to prevent cats from jumping on tables, counters, sofas, etc., although I can't personally vouch for their effectiveness, having never tried them. Check magazine ads. Perhaps one of the items will work for you.