Four checks carry nearly all of the preventable risk in a Korat: a DNA panel for GM1 and GM2 gangliosidosis, an echocardiogram for hypertrophic cardiomyopathy (HCM), a knee grade for patellar luxation, and a urine sample for stress-driven cystitis. Three of the four stay silent for months before an owner notices anything, so a fixed calendar beats a symptom list. The plan below starts at 4 months and runs to age 10.
Year one: 4 visits that build the baseline
Book 4 appointments in the first 12 months: a DNA swab at 4 months, a knee check at 6 months, an echocardiogram at 12 months, and a urinalysis with a weight curve at 12 months. Each visit runs 15 to 40 minutes. Only the echo needs preparation, a 4 hour fast that cuts gut gas and shortens the scan. Keep every value in one file, because year 2 is read against year 1, and a 0.4 mm change in wall thickness means far more when you hold 2 points instead of 1.
DNA first: 2 diseases, 1 swab
Both gangliosidoses are single-gene and recessive, and both can be tested from a cheek swab at any age, including 4 weeks. Ask for a panel that reports GM1 and GM2 separately, since a lab covering 1 variant leaves the other open. Turnaround runs 10 to 21 days and the price sits near 80 to 150 USD. Reports come back as clear, carrier, or affected, where affected means 2 copies. Carriers show no signs and should not be bred. Affected kittens usually show tremors, poor coordination, or vision loss between 2 and 6 months, and those signs need a veterinary exam that same week, because genotype and clinical staging are 2 different questions. Retesting is not needed: 1 swab covers the cat for life.
Heart: 2 numbers on the echo, and how often
First echo at 12 months, then every 12 months until age 6, then every 6 to 12 months through age 10. Two measurements drive the report: diastolic wall thickness (IVSd) and the left atrium to aorta ratio (LA/Ao). Under 5.0 mm with a ratio under 1.5 is a normal screen. A thickness of 5.0 to 5.9 mm, or a ratio of 1.5 to 1.7, moves the recheck from 12 months to 3. At 6.0 mm or above, or a ratio over 1.7, most cardiologists start medication and shorten the interval to 3 to 6 months. A proBNP blood test costs 40 to 80 USD and can raise a flag before the scan, but it cannot replace the scan. The same 2 measurements anchor the Maine Coon heart screening protocol, which is the better read for imaging detail.
Knees: 1 palpation every 6 months, 4 grades
Patellar luxation is graded by hand, not by machine. From 6 months old, have both knees palpated at every 6 month visit and scored 1 to 4. Grade 1 means the kneecap can be pushed out but returns on its own. Grade 2 means it slips out unaided and comes back. Grade 3 means it sits out most of the time and can be replaced by hand. Grade 4 means it cannot be replaced at all. Grades 1 and 2 are managed with weight control and a 10 to 15 percent body fat target, checked against a weight trend chart every 30 days. Grade 2 with a skipping gait, or any grade 3 or 4, earns a surgical consult inside 4 to 6 weeks. X-rays cost 60 to 120 USD and show arthritis rather than the grade, so they are ordered from grade 2 upward.
Urine: the 24 hour log that catches cystitis
Feline idiopathic cystitis in this breed usually follows a change: a new person, a moved litter box, a 2 day absence. Signs land 24 to 72 hours after the trigger. Run a urinalysis at 12 months and every 6 to 12 months after that, and read specific gravity every time. A value of 1.035 to 1.060 is concentrated and normal; 2 readings under 1.020 call for a kidney workup. Between visits, count litter box visits across 24 hours once a month. More than 3 visits in 10 minutes, or any crying in the box, counts as a signal. A male cat straining for 6 hours without urine is blocked, and that becomes fatal within 24 to 48 hours untreated.
4 signals the household sees first
One: sleeping respiratory rate. Count breaths for 30 seconds while the cat is asleep, double it, and record 3 times a week. At or below 30 is normal, 40 or above needs a call. Two: water intake over a 24 hour window, above 45 ml per kg of body weight. Three: weight on the same scale at the same hour, where a 5 percent drop in 30 days is a finding. Four: appetite and grooming, where 24 hours off food, or 3 days without grooming, is the line. Sweep the house once a season against the toxic plant and product list, since a single lily leaf can cause acute kidney injury in a cat.
The stopwatch: 5 signals and their deadlines
Owners tend to wait too long on breathing and too little on vomiting. The table puts a clock on the 5 signals that matter most here.
| Signal | Watch window | See a vet within | Likely cause |
|---|---|---|---|
| Breathing 40+ per minute at rest | 10 min | 1 hour | HCM, fluid |
| Open mouth breathing, blue gums | none | 0 hours | Emergency |
| Male straining, no urine in 6 hours | 6 hours | 0 hours | Urethral block |
| Hind legs weak, pads cool | 30 min | 1 hour | Clot |
| Vomiting 3+ times in 12 hours | 12 hours | 4 hours | Obstruction |
| No food for 24 hours | 24 hours | 8 hours | Dental, GI, fever |
Medication for any of these belongs to 4 classes at most, a diuretic, a beta blocker or calcium channel blocker, an antiemetic, and a pain reliever, and every one of them is dispensed only on a veterinary prescription after an exam.
Costs and a 12 month calendar
Expect 40 to 70 USD for the exam, 80 to 150 for the DNA panel, 120 to 250 for the echo, 60 to 120 for X-rays, and 40 to 80 for urine with sediment. Year 1 lands between 350 and 700 USD, and each year after runs 300 to 550. Insurance rarely pays for screening before a diagnosis, so budget it as routine care. The calendar: month 4 swab, month 6 knees, month 12 echo plus urine plus weight, month 18 knees, month 24 the full set again, then 12 month cycles with a 6 month knee check.
5 steps to start this month
- Book the 4 month swab and ask for GM1 and GM2 as 2 separate results.
- Put the 12 month echo on the calendar and write the 4 hour fast beside it.
- Count 30 seconds of sleeping breaths 3 nights a week from tonight.
- Put the scale in 1 spot and record 5 percent shifts in 30 days.
- Track 24 hours of litter box visits once a month; 3 visits in 10 minutes is the line.
Terms mentioned in this article
Frequently asked
At what age should a Korat first be screened?
Start at 4 months with the cheek swab for GM1 and GM2, since the DNA result does not change with age and early breeding decisions depend on it. The first knee palpation follows at 6 months, and the first echocardiogram plus urinalysis at 12 months. Cats adopted as adults should have all 4 checks in the first 30 days at home, then follow the yearly schedule.
Does a clear DNA test mean the heart is fine?
No. The gangliosidosis tests read 2 specific mutations and say nothing about the heart muscle. HCM is diagnosed by echocardiography, where wall thickness of 6.0 mm or more and a left atrium to aorta ratio above 1.7 are the numbers that trigger treatment. A cat can be clear on DNA and still need an echo every 12 months from age 1.
Is a yearly echo enough if the cat seems healthy?
Yearly is the minimum from 12 months to age 6, then every 6 to 12 months to age 10. Add a home breathing count 3 times a week, because a sleeping rate of 40 or more per minute can appear weeks before a scan is due. Bring the log to the appointment; it often moves the echo forward by several months.