Lilies are beautiful flowers, but when I grow them I put them at the back of the border away from where the cats go. That is because they contain toxins that are dangerous to cats and dogs.

The Internet says :

Both calla lilies and peace lilies contain insoluble crystals of calcium oxalates (insoluble means the crystals don’t dissolve in water). When a cat or dog chews on or bites the plant, the crystals are released and directly irritate the mouth, tongue, throat, and esophagus.16 Sept 2021

So be careful what plants you grow, and try and be aware of what can be dangerous to your pets.