- Some human foods are toxic to cats, even in small amounts, such as onions or chocolate.
- Most human food is either too highly spiced, or too fat-laced to be good for cats. Even though the food may smell appealing, tummy aches or vomiting might be the end result.
- A cat regularly fed human food will either lose his taste for his own food, or be too full to eat it. Either way, he will lose the essential nutrients, including taurine, so necessary for cats to survive and thrive.
- Allowing cats to eat "at the table" is creating your own home-grown monster. You may find your guests appalled at having a cat at the table, and your cat will be miffed at being banished.
In the case of holidays like Thanksgiving, I suggest feeding your cat a meal of his own food directly before your guests arrive. Chances are, he'll find a place to sleep while the humans eat. Alternately, you might save him a small bit of the turkey liver and giblets (raw) for a treat later. But let him eat it out of his own bowl, please.
More details on the hazards of feeding cats table scraps are given in my article, Human Foods for Cats?