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I'm wondering if playing with grape vines in normal for cats? My 1 year, 1 month and 17 day old cat, Oreo started to chew on my empty grape vine just a minute ago but I'm worried that it will harm him as I have read in other places that it is highly toxic to cats.

He hasn't shown any affects yet but he was only chewing on it a few minutes ago. Oreo has a special place in my heart as he came into my life during a hard time for me so I really hope that my fluff ball will be okay.