Can cat saliva kill a plant?

Seriously! I have a couple of philodendron cuttings rooting in water in a ceramic mug. They were doing fine…until the cat started drinking the water. That’s all she’s doing, is drinking the water. She not tearing them up or biting them, but they are flat dying. I have another cutting in another container that’s more like a vase, so the opening is too small for the cat to drink from, and it’s doing fine.