The domestic cat is a small, typically furry, carnivorous mammal quite similar in anatomy to other felines: a strong flexible body, quick reflexes, sharp retractable claws, and teeth adapted to killing small prey.
The largest domestic cat is the Main Coon which can occasionally reach 48 in (120 cm) in length (including the tail) and weigh up to 25 lb (11 kg). However the average cat weighs around 10 lb (5 kg) and is about 18 in (45 cm) in length. The life expectancy of indoor cats (also know as domestic cats) is 12-15 years compared to feral cats which live in the wild and may only reach 2-5 years of age.
As with any other pet, there are a number of illnesses caused by poorly or improperly feeding your cat. Among these we find: feline urologic syndrome (FUS or more commonly known as feline lower urinary tract disease); uric acid urolithiasis caused by a diet based on high amounts of purine found in beef, poultry and fish; taurine deficiency which is linked to to dilated cardiomyopathy in cats as well as to reproductive problems; secondary nutritional hyperparathyroidism (a disorder is encountered in cats fed all meat diets); obesity; type 2 diabetes mellitus; food allergies and intolerance causing gastrointestinal symptoms such as vomiting and diarrhea.
One of the most common mistake among cat owners is overfeeding, not only in quantities but also in certain nutrients. It is essential that your pet's diet is balanced to include the appropriate ratio of proteins and fat. On the other hand, underfeeding a cat is also dangerous to its health. For example, some pet owners have chosen a completely vegetarian or vegan diet for their pets and, although extremes are never a balanced option, certain dogs will happily live on such a diet. However cats cannot be fed vegetables only and, as all other felids and felines they require meat to survive and strive.
Learn to know your cat's behaviour and attitude towards food. Avoid any sudden change in diet and seek veterinary care in case you notice a change in appetite or liveliness.