Look at your food's calorie content, not just at fat content. High calorie foods, which all dry foods are, will not help your cat's weight at all. To lose weight, limit the amount of calories your cat eats every day. It is suggested to eat about 20 calories per pound of ideal body weight. It is important to lose the weight slowly. Losing weight too fast can cause serious health problems. Canned and RAW foods can help you lose the extra weight. You can find out the calorie content of canned and dry foods online. There was a post in the Catster forums sometime ago about a feline who lost 8 lbs on a Fancy Feast-only diet. Dry food is not good for cats at all, though some may disagree. If you must feed some dry, feed a good quality one and make it a small portion of your daily meal. Feed more canned so that your cat is not hungry from not enough dry food.

If your kitty has special dietary needs for a food that won't upset her system, you may want to ask your vet what to feed her since they know why she has that sensitivity. It could be a gastric problem, IBS, or even allergies to certain foods. Without knowing why your kitty has a sensitive digestive system, it's difficult to suggest a food. Vets don't always suggest you feed the food they stock, but that is usually food for animals with special needs. It's costly, but effective in most cases.