Smoked salmon is not only for bagels; many cats also enjoy this delicacy. One of the more luxurious human foods for cats, if you occasionally offer your kitty lox, they will surely come back for more! An added bonus: salmon is high in omega 3 fatty acids, which have anti-inflammatory properties and promote skin and coat health. Lox does contain sodium nitrate as part of the smoking process, so this feline delicacy should be enjoyed in moderation.
Spinach is low in calories and contains almost every vitamin and mineral, making it a great way to introduce some greens to your cat. Spinach also contains glycoglycerolipids, which research has shown to help protect the lining of the digestive tract from damage due to inflammation. Note: cats with urinary or kidney problems should avoid spinach because it also contains calcium oxalates which can contribute to the formation of crystals in the urinary tract.
One of the more commonly thought of human foods for cats, canned or frozen sardines are great sources of protein and omega 3 fatty acids. If you have a food dehydrator, give dehydrating a batch of sardines a try. You may need to chop or slice them into a smaller, easier to handle size for your cat, but the effort will likely be rewarded by happy cat cuddles.