Inadequate diet lacking proper nutrition and calories, or difficulty eating due to dental disease and mouth pain can lead to weight loss in cats.
Diet
Some cats become picky eaters as they age. Try experimenting with different food textures, warming up food to make it more appealing and encourage eating.
Picky Eating
Increased physical activity levels through more playtime and exercise can sometimes cause weight loss in cats if calorie intake is not adjusted.
Activity
Stress from changes, new environment, anxiety, new pets can reduce appetite and cause unintentional weight loss in cats.
Stressors
Intestinal worms and parasites can rob nutrients from the body and affect absorption leading to weight loss in cats.
Parasites
Frequent vomiting and diarrhea episodes can lead to dehydration, electrolyte imbalances and weight loss. Look for underlying causes.
Vomiting
Underlying illness like diabetes, hyperthyroidism, cancer or other diseases can cause noticeable weight loss in cats. A full veterinary exam is essential.
Illness