My year old pup ate a dead bird.He then coughed it up.He then chewed on Myrtle also known as periwinkle like a dog chews grass.He then coughed it up.He was not himself the rest of the day.He was not keeping down food or water.I thought it was the bird.The next day,he was not much better.I looked up periwinkle.It turns out to be poisonous to dogs and causes hallucinogens.No cure.I called Purdue,and they said if I am sure he has no more in his system...Just watch him.He is ok now.