Senior cat: adjusting diet after 10 years
From 10–12 years old, needs change: more quality protein, less phosphorus, and kidney vigilance. Here's how to adapt without disrupting everything.
💡 In brief: A senior cat doesn't "need less protein", it needs better protein. The real shift after 10 years: reduce phosphorus, monitor weight, and switch to mixed wet/dry.
The popular belief "my cat is aging, it must eat less rich" is false for most senior cats. A healthy senior needs as much or even more protein than an adult, because it assimilates it less well.
The 3 real changes
1. Raise protein quality
Aim for ≥ 40% protein on dry, with a clearly identified animal source (chicken, salmon, tuna — not "animal by-products"). Essential amino acids (taurine, arginine, methionine) become critical.
2. Reduce phosphorus
A senior often has early chronic kidney disease, sometimes silent. Objective: < 1.3% phosphorus on dry (vs 1.8% common). Check average analysis or request product sheet. Generic "Senior" dry foods don't always meet this threshold.
3. Switch to mixed wet/dry
An aging cat often drinks insufficiently and its kidneys tolerate dehydration poorly. Add at least 1 sachet or tin per day to provide 70–80% water in its diet.
What to check on the label
📌 Good reflexes: Named protein source at position 1 (chicken, not "animal proteins"), phosphorus < 1.3%, added taurine, omega-3 EPA/DHA.
When to see the vet
- Weight loss > 5% over 6 months for no apparent reason.
- Drinks a lot, urinates a lot (possible CKD or diabetes).
- Frequent vomiting, even if the cat seems well.
- Loss of muscle mass visible on hind legs.
A blood test + urinalysis once a year after 10 years, that's the minimum. And once every 6 months after 14.
What NOT to do
⚠️ Avoid: Switching to hypocaloric "senior light" dry foods if the cat is not obese. Many seniors lose muscle, not fat — restricting them accelerates sarcopenia.
Water, always water
Fountain (cats prefer running water), several water points around the house, wide shallow bowls to avoid whisker irritation. And if your cat drinks very little, that's a signal — not "its character".
✅ Remember: More quality protein, less phosphorus, and always some wet food. The rest (joint supplements, omega-3) is discussed with your vet based on tests.
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