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The Silent Epidemic of Indoor Cats

40-60% of indoor cats are overweight or obese.

They may seem "normal," "sturdy," or "well-fed." In reality, being overweight is one of the leading causes of:

  • Diabetes mellitus (10x more likely).
  • Osteoarthritis.
  • Urinary disease.
  • Reduced life expectancy (2-3 years).
  • Hepatic steatosis (lipidosis).

Yet, 70% of owners underestimate their cat's weight.

Let’s see how to recognize the problem and solve it safely.

How to Recognize Overweight

Just weighing is not enough. The Feline Body Condition Score (BCS) matters — a 9-point system.

The Visual Test from Above

Normal: waist visible, hips not protruding.

Overweight: slightly visible waist, "oval" body.

Obese: no waist, "round" body, sometimes "pear-shaped" (droopy belly).

The Palpation Test

Ribs:

  • Normal: easily palpable with light pressure.
  • Overweight: palpable with moderate pressure.
  • Obese: difficult to feel, under a layer of fat.

Stomach:

  • Normal: slightly concave (cats) or flat.
  • Overweight: slightly protruding.
  • Obese: visible "droopy belly."

Base of the tail:

  • Normal: bones palpable.
  • Obese: visible fat, not palpable.

The BCS Scale 1-9

  • 1-3: underweight.
  • 4-5: normal weight (target).
  • 6: slight overweight.
  • 7: overweight (+15-25%).
  • 8: obese (+25-30%).
  • 9: severe obesity (+30%+).

Ask your veterinarian: they will tell you your cat's precise BCS.

Target Weight by Breed

Average domestic European: 3.5-5 kg.

Larger breeds:

  • Maine Coon: 6-10 kg.
  • Norwegian: 5-9 kg.
  • British Shorthair: 4-7 kg.

Smaller breeds:

  • Singapura: 2-4 kg.
  • Siamese: 3-5 kg.

Sexual differences: males typically 20-30% heavier.

The Risks of Being Overweight

1. Diabetes Mellitus

Statistic: overweight cats have a risk 4-10 times greater.

Consequences:

  • Daily life-long insulin.
  • Costs: €100-200/month.
  • Serious complications possible.

Good news: weight loss can lead to remission of diabetes in 30% of cases.

2. Osteoarthritis

Every gram of excess = 4 grams of load on the joints (due to biomechanical multiplier).

Consequences:

  • Chronic pain.
  • Reduced activity.
  • Difficulty jumping.

3. Hepatic Steatosis (Lipidosis)

Specific danger for cats.

What happens:

  • Overweight cat stops eating.
  • Body "metabolizes" stored fat.
  • Liver overloaded = lipidosis.
  • Deadly if untreated.

Implication: overweight cats should never lose weight too quickly.

4. Urinary Diseases

Overweight cats are at greater risk of:

  • Idiopathic cystitis.
  • Urinary crystals/stones.
  • Early kidney failure.

5. Reduced Life Expectancy

Studies:

  • Overweight cats live 1-2 years less than normal-weight.
  • Obese cats live 2-3 years less.

How Did It Happen?

Causes of feline overweight:

1. Overfeeding:

  • Excessive portions.
  • Free feeding.

2. Poor quality food:

  • Cheap kibble with high carbs.
  • Low satiety.

3. Sedentariness:

  • Indoor life.
  • No natural hunting/movement.

4. Neutering:

  • Metabolism slows down by 20-30%.
  • Often diet is not adjusted.

5. Age:

  • Older cats are less active.
  • Reduced metabolism.

6. Stress:

  • Eats due to anxiety.
  • Especially for solitary cats.

The Safe Weight Loss Plan (specific for cats)

Attention: the cat must NOT lose weight like a dog. Too rapid weight loss = hepatic lipidosis.

The Golden Rule

Maximum 1-2% of weight per week.

Example: 6 kg cat → max 60-120 g/week.

Faster = dangerous.

Step 1: Veterinary Visit

Mandatory:

  • Confirm diagnosis.
  • Precise BCS.
  • Exclude medical causes (hypothyroidism, hyperthyroidism).
  • Calculate individual target weight.
  • Personalized dietary plan.

Step 2: Choose Weight Loss Food

Specific "light" wet food:

  • Royal Canin Satiety Wet.
  • Hill's r/d.
  • Purina OM Wet.

Weight loss kibbles:

  • Royal Canin Satiety.
  • Hill's r/d.
  • Purina OM.

Preference: wet food for maximum hydration during diet.

Cost: €80-150/month.

Step 3: Calculate Portions

Formula (calculated by the veterinarian):

  • Target weight × 35-40 kcal = daily requirement for weight loss.
  • Example: 5 kg target cat × 35 kcal = 175 kcal/day.

Compare with kcal of chosen food = precise portion.

Do not improvise: too small portions = dangerous.

Step 4: Distribute Meals

3-4 small meals a day:

  • 7:00
  • 12:00 (if possible)
  • 18:00
  • 22:00

Distribution reduces:

  • Insulin peaks.
  • Excessive hunger.
  • Stress.

Step 5: Monitor Weight

Weekly weighing:

  • Same scale.
  • Same time.
  • Record.

Home weighing:

  • Weigh yourself with and without the cat.
  • Difference = cat's weight.

Wait for the veterinarian every 1-2 months.

Exercise: The Feline Challenge

Getting a cat to exercise is not the same as with a dog. But it is essential for weight loss.

Strategies

1. Daily interactive play:

  • 15-20 minutes, 2-3 times a day.
  • Feather wand, plush toys.
  • Simulate hunting.

2. Puzzle feeders:

  • Food distributed throughout the day.
  • Mental stimulation + movement.

3. Air routes:

  • Shelves, climbing racks.
  • Tall scratching posts.
  • Vertical movements burn calories.

4. Catio:

  • Enclosed porch.
  • Safe outdoor exploration.

5. Tracking with food:

  • Scatter kibbles around the house.
  • The cat finds them while "hunting."

The 5 Behavioral Strategies

  • Scheduled meals, not always-full bowl.
  • Elimination of snacks: no extra treats.
  • Anti-gorging bowl: slows down consumption.
  • Separate meals if more than one cat (to avoid "competition").
  • Distraction instead of food: play when they want a snack.

Errors to Avoid

❌ Drastic weight loss (risk of lipidosis).

❌ Skipping meals.

❌ DIY diets.

❌ Uncontrolled "low-calorie" snacks.

❌ Sudden food changes.

❌ Ignoring stress signals during the diet.

Signs of Hepatic Lipidosis

Danger during weight loss:

  • Cat stops eating.
  • Vomiting.
  • Lethargy.
  • Jaundice (yellow mucous membranes).
  • Dehydration.

Absolute veterinary emergency.

Never let a cat fast for more than 24-48 hours, especially if overweight.

Timing of Weight Loss

For a cat overweight by 20%:

  • Month 1: -3-5% weight.
  • Month 2: -3-5%.
  • Month 3: -3-5%.
  • Month 4-6: approaching target.

Total time: 4-8 months.

Patience. There is no "safe quick weight loss" for a cat.

The Costs

Weight loss food:

  • +30-50% compared to cheap options.

Veterinary visits for monitoring:

  • €50-100 every 1-2 months.

Exercise:

  • Investment in toys: €50-150 one-time.

Total: €150-300 above normal feeding.

Benefit: 2-3 extra years of life, diabetes prevention (€1,000+ per year).

Affordable investment.

The Success Story

Real Case: Tom, domestic cat, 9 years old, 8 kg (target 5 kg).

Diagnosis: 60% overweight.

Diet: Royal Canin Satiety, precise portions, daily play 20 min × 3 times.

Results:

  • Month 3: 7 kg.
  • Month 6: 6 kg.
  • Month 9: 5.2 kg (target achieved).

Transformation:

  • More active.
  • Jumps on furniture (which he hadn't done).
  • Shinier coat.
  • Normal blood sugar.
  • Peaceful life.

Life expectancy post-weight loss: +3 years.

The Truth

Cat overweight is completely reversible.

Time: 6-12 months.

Results:

  • Healthier cat.
  • More active.
  • Increased life expectancy.
  • Reduced veterinary costs.

Key: personalized diet + exercise + monitoring.

What NOT to do:

  • Improvise diets.
  • Rapid weight loss.
  • Ignore the problem.

Your cat does not choose what to eat. You do. Be responsible for their health.

The "adorably chubby" cat today is a sick cat tomorrow. Misleading appearance. Let’s begin the transformation.

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