Getting the most from your vet — recheck intervals, tests to ask for, red flags
CKD is a disease you live with for years. So how you use your vet changes the outcome nearly as much as which drugs you use.
Most owners have the same experience in the consult room: you arrive with a list of questions, your cat is crying, five minutes vanish, and only in the car do you realise you never asked the most important one.
This chapter exists to prevent that.
1. How often to go
It depends on stage. Below are typical intervals based on IRIS guidance, assuming things are stable.
| Stage | Recheck interval | Focus at this stage |
|---|---|---|
| 1–2 | 3–6 months | Establish rate of progression; catch hypertension and proteinuria early |
| 3 | 2–3 months | Phosphorus, potassium, anemia; settling the diet |
| 4 | 1–2 months, or more often | Symptom control, quality of life |
More important than the table — regardless of interval, recheck in 2–4 weeks whenever:
A new medication was started (especially antihypertensives, ACE inhibitors/ARBs, phosphate binders)
The food was changed
Fluid volume or interval was changed
The last set of values took a sudden turn
If something changed, verify it. That one rule covers it.
A new medication was started (especially antihypertensives, ACE inhibitors/ARBs, phosphate binders)
The food was changed
Fluid volume or interval was changed
The last set of values took a sudden turn
If something changed, verify it. That one rule covers it.
2. The test set to request at every recheck
Every clinic's default panel differs. Asking only for "kidney bloods" often gets you creatinine and BUN and nothing else. Ask for the following by name.
| Test | Why it matters | How often |
|---|---|---|
| Creatinine · BUN | Baseline kidney values | Every visit |
| SDMA | Less affected by muscle mass — key in a cat losing condition | Every visit or alternate |
| Phosphorus (P) | The core management target; goal varies by stage | Every visit |
| Potassium (K) | Dangerous high and low | Every visit |
| Total protein · albumin | Nutritional status, protein loss | Every visit |
| HCT / PCV | Anemia — tied directly to energy and appetite | Every visit |
| Blood pressure | Frequently skipped. Ask out loud | Every visit |
| Urine specific gravity (USG) | Concentrating ability | Every visit |
| UPC (urine protein:creatinine) | Proteinuria is an independent risk factor for progression | At diagnosis + every 6 months |
| Urine culture | Silent UTIs are common in CKD cats | Every 6–12 months, or if suspected |
| T4 (+ TSH) | Thyroid disease masks CKD | Yearly from age 7 |
| Body weight | The most underrated marker. Same scale every time | Every visit |
Why UPC needs asking for specifically
Proteinuria independently accelerates kidney damage. At the same creatinine, the cat with the higher UPC deteriorates faster.
- Above 0.4 is abnormal and worsens prognosis
- One reading isn't enough — confirm on two or more samples at least two weeks apart to establish persistence
- If persistent, an ACE inhibitor or ARB (telmisartan and others) is considered
3. Preparing before you go
Bringing urine from home helps enormously
Urinalysis is dropped from a visit surprisingly often simply because no sample could be obtained at the clinic.
- Use non-absorbent litter (plastic beads), available online and from pharmacies
- Collect into a clean container, refrigerate, and deliver within about four hours
- But culture cannot use a home sample — it will be contaminated. That requires cystocentesis at the clinic
Ask before fasting
Standard kidney values are not meaningfully affected by a recent meal, though lipids, glucose and a few others are. Phone ahead and confirm. Fasting a CKD cat for no reason is only a burden.
What to bring
- A photo of the current food bag with the analysis panel visible
- Every medication and supplement, with doses
- Previous results, including from other clinics
- Your home log (see below)
4. Clinic stress changes the numbers
White coat hypertension — a frightened cat reads far higher than its true blood pressure.
Starting antihypertensives on that reading can cause hypotension.
To measure blood pressure properly:
- Not immediately on arrival. Allow 5–10 minutes or more to settle in a quiet room
- With you present
- Multiple readings, averaged. Never start medication off a single value
- Many cats do better left inside the carrier
Stress also shifts glucose and potassium. If blood was drawn from a struggling cat, note that alongside the result.
Making the trip less frightening
- Leave the carrier out in the living room all the time. If it only appears on vet days, the carrier itself becomes the fear
- A top-opening carrier is far better — no dragging her out
- Cover it with a towel to block the view
- Feline pheromone spray 30 minutes beforehand helps
5. What to log at home — five minutes a week
You hold information a vet cannot obtain in a five-minute consult. A written record changes the quality of the visit.
| What | How | Why it matters |
|---|---|---|
| Weight | Weekly, same scale | The earliest warning — it moves before the bloodwork does |
| Amount eaten | Rough daily total | "She's eating fine" is not reliable data |
| Water drunk | Daily total, once or twice a week | A sudden rise signals progression |
| Urine clump size and count | While scooping | Reflects concentrating ability |
| Vomiting episodes | Just the dates | Memory always undercounts |
| Sleeping respiratory rate | One minute while asleep | Early warning for cardiac problems and pulmonary edema. Under 30 is normal |
The CatLab app's Care Companion and phosphorus calculator assemble these automatically.
In the consult room you can simply show the screen.
6. What to ask in the room
Write them down beforehand, and ask the most important one first — whatever is left at the bottom is what gets cut when time runs out.
Three to ask every time
- "Compared with last time — better, the same, or worse?"
- "Which value should I be watching most closely right now?"
- "When should we come back, and what would mean coming sooner?"
Situation by situation
- Values got worse — "Could something temporary explain this — dehydration, infection, stress? Should we repeat it in a few days?"
- New medication — "When should I see an effect? What side effect means stopping and calling you? When do we recheck?"
- Asked to change food — "How far above target is her phosphorus? If she won't eat it, what's the alternative?"
- Not eating — "Could this be nausea or pain? Can we try an appetite stimulant?"
- A test is recommended — "Will the result change what we do?" (the single most useful sentence here)
Rephrasing changes the answer
❌ "Is she okay?" → usually ends at "let's keep an eye on it"
⭕ "Her phosphorus is 6.2 and I understand the stage 3 target is 5.0. Is this the point to start a binder?"
Specific numbers get specific answers.
❌ "Is she okay?" → usually ends at "let's keep an eye on it"
⭕ "Her phosphorus is 6.2 and I understand the stage 3 target is 5.0. Is this the point to start a binder?"
Specific numbers get specific answers.
7. When to go right now
Don't wait for the scheduled recheck — go immediately
No urine passed for over 24 hours — especially in a male cat. Urinary obstruction kills within hours
Straining in the box with nothing produced, repeated trips
Open-mouth breathing, or breathing where the belly heaves
Nothing eaten for over 24 hours (48 hours enters hepatic lipidosis territory)
Repeated vomiting so that even water won't stay down
Unable to stand, or sudden loss of use of the hind legs
Seizures, heavy drooling
Pale or bluish gums
Low body temperature that doesn't recover — paws and ears staying cold
Apparent sudden blindness, persistently dilated pupils — a hypertensive emergency
No urine passed for over 24 hours — especially in a male cat. Urinary obstruction kills within hours
Straining in the box with nothing produced, repeated trips
Open-mouth breathing, or breathing where the belly heaves
Nothing eaten for over 24 hours (48 hours enters hepatic lipidosis territory)
Repeated vomiting so that even water won't stay down
Unable to stand, or sudden loss of use of the hind legs
Seizures, heavy drooling
Pale or bluish gums
Low body temperature that doesn't recover — paws and ears staying cold
Apparent sudden blindness, persistently dilated pupils — a hypertensive emergency
Urinary obstruction and hyperkalemia are hour-by-hour dangers in a CKD cat. "We'll go when they open in the morning" can be too late.
8. When you disagree with your vet
This comes up precisely for owners who have done the reading. A few thoughts.
- It's a question, not a fight. "What I've read says this — why is it different for her?" There is usually a reason specific to your cat
- Guidelines are averages. The cat in front of you may not be average, and the person who knows that is the one who examined her
- A second opinion isn't rude. Before a major decision — dialysis, transplant, euthanasia, expensive long-term treatment — it's normal
- But changing clinics often costs you. CKD is managed on trends, and accumulated history in one place is a real asset
Sometimes you should change. If blood pressure is never measured even when you ask, if questions are unwelcome, if results are never explained —
this is a disease you'll live with for years, and that is reason enough to move.
9. Related
- How to read kidney values on a blood test — decoding the results you bring home
- When another disease comes too — the test list grows
- Potassium — dangerous high and low
- The day of diagnosis — what to do today
One idea holds this chapter together. You see the 364 days your vet never will.
Bring those 364 days in writing, and the five minutes get far more accurate.