Three numbers run this breed's health plan: body condition score, the depth of the gum pocket, and left ventricular wall thickness. Obesity is the multiplier, because it worsens the other 2 and hides them at the same time. The screen is a monthly weigh-in with a 1 to 9 score, an echo at 12 months and every 12 after, a dental check with full-mouth X-ray at 24 months and every 12, a urinalysis yearly, and 1 blood panel at 24 months for glucose and fructosamine. Breed-specific published evidence is limited, so the intervals here come from obesity and dental practice rather than from cohort studies.
Why weight comes first
A cat at a score of 8 out of 9 carries roughly 20 to 30 percent more body weight than the same cat at 5, and every extra kilogram adds load to the stifles, the spine and the heart. Fat is also endocrine tissue: it raises the baseline inflammatory load, which shows up in the gum line first, since gingivitis in an overweight cat progresses faster than in a lean one on the same diet. Weight loss changes 3 measurements at once, which is why 8 to 12 weeks of controlled loss at 1 to 2 percent of body weight per week is the first instruction in most plans, ahead of any dental work.
Screening schedule by age
| Test | Start (months) | Repeat (months) | USD | CNY |
|---|---|---|---|---|
| Weight and body condition score | 4 | 1 | 0 | 0 |
| Cardiac echo | 12 | 12 | 250-450 | 1,800-3,200 |
| HCM DNA panel | 2 | 0 (once) | 80-150 | 600-1,100 |
| Dental check with full-mouth X-ray | 24 | 12 | 150-350 | 1,100-2,500 |
| Urinalysis with UPC | 12 | 12 | 45-90 | 320-650 |
| Glucose and fructosamine panel | 24 | 12 | 60-120 | 430-850 |
The free row is the one that decides the others. Weigh on the same scale, at the same time of day, before the morning meal, and write the number down; a rise of 5 percent over 3 months is the trigger to cut portions by 10 percent rather than wait for the next visit. The 24-month dental X-ray is not optional in a breed with early periodontal change: about half of resorptive lesions sit under intact enamel and cannot be seen with the eye or a probe.
Body condition score, in 3 checkpoints
Score with hands, not eyes, because a shorthair coat hides 1 to 2 points. At 5 out of 9 you feel the ribs under a thin fat layer, see a waist from above, and feel a small abdominal fat pad. At 7 the ribs need pressure, the waist is gone and the pad is obvious. At 8 to 9 the ribs cannot be felt at all and the abdomen is pendulous. Target a loss of 0.5 to 1 percent of body weight per week for a cat that needs to come down 2 points, and recheck the score every 30 days.
4 signals visible at home
- Weight up 5 percent in 3 months. On a 5 kg cat that is 250 g, which is easy to miss by eye and impossible to miss on a scale.
- Bad breath at 30 cm and a red gum line. Breath that smells from arm's length, or a red band along the molars, means gingivitis has moved past the brushing-only stage.
- Chewing on one side, dropping kibble. Food falling out after 2 chews, or a cat that tilts its head to chew, points at a painful tooth rather than at fussiness.
- Sleeping respiratory rate above 30. Count for 30 seconds while asleep and multiply by 2; 3 readings of 30 or more in a week needs an echo, not a wait.
Hour-level thresholds: when to stop watching
| Signal | Threshold | See a vet within (hours) |
|---|---|---|
| Open-mouth breathing at rest | 1 minute or more | 0 (now) |
| Sleeping respiratory rate | above 40 breaths per minute | 4 |
| Refusing food, overweight cat | 24 hours, or 12 hours with vomiting | 12 |
| Vomiting | 3 times in 12 hours | 6 |
| Gum bleeding while eating | 2 episodes in 7 days | 48 |
| Weight gain over 5 percent | in 3 months | 336 (book a visit) |
The entry that matters most is food refusal in an overweight cat. A cat carrying 2 or more extra points that stops eating can start mobilizing fat to the liver within 48 to 72 hours, and hepatic lipidosis is far harder to treat than the original reason for the fast. A 24-hour fast is a clinic visit, not a wait-and-see, and 12 hours with vomiting is already late.
What each test measures
Echo reports wall thickness at end-diastole (6 mm is the working cut-off), left atrium-to-aorta ratio (1.5 or above means enlargement) and mitral flow. The dental film reads bone loss around the roots and the radiolucent wedges of resorptive lesions. Urinalysis with UPC covers concentration, protein, crystals and glucose; a UPC above 0.4 in a cat with dilute urine is a kidney flag. The 24-month panel reads fasting glucose and fructosamine together, because 1 high glucose in a stressed cat means little while a high fructosamine over 3 weeks means a lot.
Cost, and what moves the number
Echo runs 250 to 450 USD (1,800 to 3,200 CNY at 7.1) and a full first-year plan of echo, DNA, urine and monthly weigh-ins sits at 380 to 700 USD (2,700 to 5,000 CNY). Dental work is the swing item: a scaling with full-mouth X-ray costs 350 to 700 USD (2,500 to 5,000 CNY), and extractions add 40 to 120 USD per tooth (280 to 850 CNY), which is why 8 to 12 weeks of weight loss before anesthesia is worth the wait. A bag of prescription weight-loss diet for 12 weeks runs 90 to 150 USD (640 to 1,070 CNY).
The first 12 months, step by step
- Month 4: first weigh-in, score recorded as a number, and a photo of the cat from above as a waist reference.
- Month 6: brushing 3 times a week with an enzymatic paste; weigh monthly and log it.
- Month 8 to 10: portion the day's food by weight in grams, not by eye, and stop free-feeding if the score is above 6.
- Month 12: echo, urinalysis with UPC, baseline blood panel. Set 2 reminders: monthly scale, annual heart and urine.
- Month 24: dental check with full-mouth X-ray, glucose and fructosamine; book the cleaning if the gum pocket is 2 mm or deeper.
Year 1 with nothing found lands between 500 and 850 USD (3,500 to 6,000 CNY). The related screens at /health/breed-american-shorthair-health-screen/ and /health/breed-oriental-shorthair-health-screen/ use the same echo interval with different dental and coat risks, and /tools/breed-quiz/ is the quickest way to confirm which line a rescue cat belongs to before you set a 12-year plan.
Terms mentioned in this article
Frequently asked
My Brazilian Shorthair is only slightly overweight. Does that still matter?
A cat 1 point above 5 on the 9-point scale carries about 10 percent extra weight, which is enough to shorten the comfortable jump and to make anesthesia riskier. The practical step is monthly weighing on the same scale plus a 10 percent portion cut, which usually produces 0.5 to 1 percent body weight loss per week. Free-feeding is the usual blocker: measured meals in grams fix it in about 3 weeks.
How often should a cat this breed have a dental cleaning, and is X-ray needed?
A dental check every 12 months from 24 months, with cleaning when the gum pocket reaches 2 mm or tartar sits under the gum line. Full-mouth X-ray is the part that changes outcomes, because roughly half of resorptive lesions are invisible under intact enamel and only show as a radiolucent wedge on film. Brushing 3 times a week at home delays the first cleaning by about 1 to 2 years in most cats.
What is the earliest sign of heart disease in a cat that seems fine?
The sleeping respiratory rate is the one you can measure at home: count 30 seconds of breaths while the cat is deeply asleep and multiply by 2. A rate of 30 or more on 3 separate days, or a rise of 10 above the cat's own baseline, warrants an echo within 2 weeks. Murmurs are unreliable here, and many cats with measurable wall thickening have none at all.