Generally if enough leaves flowers or buds are eaten an animal can suffer from diarrhea and vomiting. The toxins of the colorful flowering shrub usually lead to. If a dog eats any part of the hydrangea plant he can be poisoned. People and pets including horses dogs and cats can experience hydrangea poisoning. I have never systematically learned what things are poisonous to dogs although I am careful to not mine eat stuff mainly because I hate to clean up their puke in my house A friend emailed me today saying he learned the hard way that the lovely plant Hydrangea makes dogs very sick.
Some of the clinical signs you will include diarrhea vomiting and or depression. The diarrhea and vomiting will run its course as the hydrangea passes through your dogs. Hydrangeas are not edible and are poisonous to cats dogs and horses. Scientists believe this substance is used to help protect the plant from insects and more. Hydrangeas contain cyanogenic glucosides which according to the ASPCA and the Pet Poison Helpline are toxic to dogs cats and horses.
