It is important to change diets gradually. Switching foods too quickly can cause vomiting, diarrhea, or excess gas. Unlike humans, dogs and cats often eat the same diet for months or years, and their digestive systems are not as used to change. Keep the ratio of old to new food the same for several days. This will allow your pet to adjust to the new ratio before you incorporate more new food. This is just a guideline, and you can increase transition time if your pet is particularly sensitive.

Lysine plays a role in growth, as well as the production of carnitine, which turns fats into energy and helps lower cholesterol.

It also assists in calcium absorption and collagen production.
Collagen is responsible for keeping skin, bones, cartilage and tissues healthy.

Symptoms of Lysine deficiency includes weight loss & depressed food intake

“Growth” foods necessary at the puppy stage have higher protein levels
and calorie counts to meet your pup's developmental needs.
But once your pup is six to 12 months old those needs change.
That's usually when your puppy is nearing his adult height and can transition to adult food.

Usually, adult dogs should be fed once or twice a day.
Most large-breed dogs should be fed at least twice a day so they don't overeat and get bloated.
Experts agree that treats and table scraps should never be more than 10% of your dog's daily calories.
Just like with people, overeating can make your dog overweight and that can lead to the same kinds of health problems that people have, such as diabetes and heart disease.

For more useful information and tips browse - www:pets.webmd.com

An occasional nibble is OK. But, giving big chunks of steak fat, poultry skin, and other greasy leftovers isn’t a good idea.
If your dog is overweight, stay away from table scraps.
Also, if you don’t want your dog hanging around the table at mealtimes, don't feed it scraps.

Puppies should eat three times a day from weaning through four to six months, if possible.
After six months, twice-a-day feedings are fine.