Are Oranges Toxic To Cats. Repel bugs according to sfgate.com, orange peels contain a 90 to 95 percent concentration of limonene, a chemical that is toxic to mosquitoes, flies, and other bugs. Problem with citrus fruits like oranges, lemons.

Read on to discover why you shouldn't share this yummy snack with your furry bestie. Most will make a full recovery within a number of hours, with no lasting health issues related to the incident. The peel is the most harmful part of an orange for your cat as it contains the highest amount of chemical compounds and essential oils.