Definitely find a way to keep them away from your plants. And maybe get them some wheat grass to nibble on instead. Lots of house plants are bad for housepets, but they do feel compelled to nibble on some green at times to aid their digestion. I've managed to keep my cats and dogs out of my plants by putting all my plants and trees places they can't get to--and bringing in specific greenery that they can eat (pet grass, which is wheat grass) and putting that down low where they can get to it. One of my cats is practically a sheep, he eats so much green grass.