This time of year brings a spike in certain types of cases, many of which are preventable. One of the biggest illnesses we see is pancreatitis.
Here is a link to a quick Q&A with a vet on this condition.
Please know that even a "little" of something can make your pet very sick, even IF they have had it in the past.
I recall an 11 yr old Golden Retriever that came in after Thanksgiving one year and had to be hospitalized for days for getting a small piece of turkey. He had some in past years. He almost didn't make it. Once the pancreas starts releasing digestive enzymes into the surrounding tissues - it's not only painful but very possibly fatal. This is no joke.