Lupin and cats

My cat has just this moment taken to chewing one of my dwarf lupins resulting on the flower stem being broken and I noticed he's also chewed the leaves. Looking on Google it seems lupins are dangerous/poisonous to cats amongst other plants. Should I remove the lupins or would it likely be a one off
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He may be feeling the need of some greenery to nibble ... it can help with expelling fur balls ... you can usually get special grass for cats from the larger pet stores ... or you can grow it yourself https://www.suttons.co.uk/Gardening/Flower-Seeds/All-Flower-Seeds/Cat-Grass_108464.htm#close
Also perhaps growing some Nepeta would attract him to a different part of the garden and away from the lupins.
Cats are tinkers for chewing plants, kinda funny unless it's poisonous of course.