Dogs chewing any parts of peace lilies (Spathiphyllum spp.) release the plants' calcium oxalate crystals. The sharp crystals damage tongue and throat tissues, stimulating a histamine release--allergic reaction--that aggravates the problem. Symptoms include digestive upset, drooling and, in severe cases, difficulty breathing or swallowing and swollen tongue.
About this Author
A freelance writer, Judy Wolfe has owned Prose for the Pros, a freelance writing business, since 2006. She's been an inveterate traveler since 1961 and draws on her travel experiences to provide articles for such websites as Chincoteague Island Vacations and Berlin Dude. Wolfe holds a Bachelor of Arts in literature from California State University at Pomona.