My mom has three Chihuahuas. An apple head Chihuahua named Dewlanna, 7 years old. She weighs about eight pounds and needs to weigh five or six. A deer chihuahua mix named Oreo, 3 or 4 years old. He weighs fifteen pounds, but doesn't look obese, just overweight. And a deer chihuahua mix named Boo-Boo, 1 year old. He doesn't need to lose any weight.
Walks or another form of exercise. That is a great way to get weight off (dogs and people!) Make sure they are all getting the right amount of food. Use separate dishes for each, don't free feed the dog, and cut down on table scraps. (Not saying that you do any of those things, just covering the bases.) Free feeding and feeding out of the same dish sometimes let one dog have more and another less. Also check how much to feed each with your vet...age does factor into portion size. Truly the most important thing is to get them exercise. Dogs love it, its good for them, and its quality time spent with them. Good luck! :)
What food does your mom have the dogs on first of all? Be sure it is a quality food. Chihuahuas require very little food to maintain their weight level. But they do need a quality food, for example, not a grocery store shelf brand.
Exercise them daily, be diligent about it. Get them walking 2 or 3 good walks a day. Doesn't have to be for miles and miles, just get them moving.
15 pounds is way too heavy for a Chihuahua, they have such a small bone structure, it can't be good on their joints to carry that much weight around.
Can you post pictures of your dogs? We have a Chihuahua too, but she gets plenty of exercise wrestling with her Pit Bull sister.
Does your mom feed them table scraps? Chihuahuas are notorious beggers and who can resist those big eyes? Stop the people food, too high caloric for them. Stick to a good, dry kibble food and get them moving.
***Edited By: Basset_Lover on 1/14/2007 10:00:55 AM*** Reason: :P