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Good Morning and welcome to Just answer. I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
The safest thing to do is to induce vomiting by giving Scrappy 4 teaspoons of hydrogen peroxide. If he has not vomited this bag within 10 minutes, do it again. This bag may or may not cause him problems but considering Scrappy's age, I would worry that if this bag caused an obstruction, surgery would be very risky....it is safer to remove it.