Citrus

Citrus plants’ stems, leaves, peels, fruit, and seeds contain varying amounts of citric acid, which can cause irritation and possibly even central nervous system depression if consumed in large quantities. Small doses, such as eating the fruit, are unlikely to cause anything more than minor stomach discomfort.
Grapes and Raisins
There are better treats for your dog, trust us. For dogs, grapes and raisins can cause kidney failure. Even a small amount of it can make a dog sick. Vomiting repeatedly is a huge warning sign. Your dog will become sluggish and depressed within a day if this is the issue.
Chocolate, Coffee, and Caffeine

Methylxanthines are present in all of these products. Methylxanthines can cause vomiting, diarrhea, excessive thirst, and urination in pets, as well as hyperactivity, abnormal heart rhythm, tremors, seizures, and even death.
Alcohol
Don’t share your drink with your pet! Vomiting, diarrhea, and even death can be caused by alcoholic beverages and food products containing alcohol. Under any circumstances, alcohol should not be given to your pet.
Avocado

Avocados may be a popular breakfast treat amongst millennials, but they pose a threat to rabbits, birds, and horses. The creamy treat can cause cardiovascular damage and swollen heads.