Dehydration occurs when fluid levels drop to less than normal. This is due to either reduced water intake or increased fluid loss. Overheating in hot weather, increased activity or a bout of vomiting or diarrhea can all result in fluid loss in cats.
Whole Grains. Start eating more whole grains, a fiber-rich food, to improve your joints. Fiber helps lower levels of a harmful substance known as c-reactive protein that leads to higher inflammation levels throughout the body, including the joints, according to the Arthritis Foundation.
Several vitamins and minerals have been studied for their protective effects on the joints. They include copper, selenium and vitamins C and D. Copper is a trace mineral available in shellfish, organ meats, beans and several other foods.