Marshmallows are not recommended for cats. Cats are obligate carnivores and thrive on animal-based proteins. Marshmallows contain sugars and artificial additives that aren't suitable for feline consumption. can cats eat marshmallows Feeding marshmallows to cats can lead to digestive issues or potential weight gain. Prioritize a balanced, cat-specific diet and consult your vet if you have concerns about introducing any human foods.