Pet Nutrition by Life Stage
The right diet for a 2-year-old dog is very different from the right diet for a 12-year-old dog. Here is what changes and why.
Dogs: Nutritional Needs by Stage
Puppy (0-1 year)
High protein (28-32%), high fat, calcium and phosphorus optimized for bone development. Large breed puppies need specially formulated food to prevent too-rapid growth. Feed 3-4 small meals per day.
Adult (1-7 years)
Maintenance calories. Protein: 18-25%. Switch to twice-daily feeding to reduce bloat risk. Choose quality protein sources. Avoid excessive treats.
Senior (7+ years)
Healthy senior dogs do NOT need lower protein. Higher quality protein maintains muscle mass. What often changes: slightly fewer calories, increased omega-3 fatty acids, potentially lower phosphorus if kidney disease is present. Always consult your vet before switching to a senior formula.
Cats: Nutritional Needs by Stage
Kitten (0-1 year)
High protein (35%+), high fat, and DHA for brain development. Cats are obligate carnivores needing taurine and vitamin A from animal sources. Kittens need 2-3x the calories per kg of adults.
Adult (1-10 years)
Wet food provides important hydration. Cats have low thirst drive and tend to be chronically slightly dehydrated on dry-only diets β which matters for long-term kidney health. Feed measured portions twice daily.
Senior (10+ years)
High-quality, highly digestible protein is critical β senior cats absorb protein less efficiently. Wet food becomes even more important. Phosphorus restriction required if CKD is present (vet guidance needed).
Key Supplements for Senior Pets
| Supplement | Dogs | Cats | Benefit |
|---|---|---|---|
| Omega-3 fish oil | Yes | Yes | Joints, coat, cognition, kidneys |
| Glucosamine | Yes | Some | Joint cartilage support |
| Probiotics | Yes | Yes | Digestion, immunity |
| B vitamins | If deficient | CKD cats | Energy, nerve function |
One rule that never changes: fresh water, always available. This is the single most important nutritional intervention for any pet at any age.