These stories are shared directly by guardians who regularly provide their cat’s health check results to Greycoat Research.
About Greycoat Program
Since July 2025, Greycoat Research has been running the Greycoat Program in Korea and Japan, helping guardians support daily kidney care at home.
Through this program, veterinarians and pharmacists collaborate to provide general guidance. This helps guardians feel more confident supporting their cat’s diet, nutrition, and daily lifestyle at home.
Among the cases submitted, one entry stood out due to the complexity of the challenges involved.
Soommu's Story
Soommu is a cat who faced severe overlapping issues: suspected Stage 4 CKD, rapid weight loss, extreme appetite decline, and a significant downturn in condition following stem cell treatments.
His guardian contacted us during a time of great uncertainty.
Over the course of three months, his daily life became more stable.
The story below is written directly from the guardian’s perspective.
The following account is based entirely on the guardian’s observations and records.
- Name: Soommu
- Age: 9 years
- Home: Korea
- Condition: Stage 4 CKD, severe anorexia, weight loss, lethargy, deterioration after stem cell treatment.
- Greycoat Program Period: July 15, 2025 – October 14, 2025
It is not medical advice, treatment guidance, or a guarantee of results.
Every cat’s condition is different, and guardians should consult their veterinarian for diagnosis and care decisions.
1. Changes in Soommu’s Bloodwork
Before starting the program, Soommu’s bloodwork values were at a level that had both the vet and me extremely worried. By November, the follow-up results showed that his values had settled into a much more stable range. For us, this meant Soommu had finally entered a 'safe zone' where we could monitor him with greater peace of mind. My veterinarian also agreed that his condition is now comparatively easier to manage.
This does not indicate a treatment effect, and every cat’s condition can change in very different ways. Please consult your veterinarian for diagnosis, monitoring, and care decisions.
| May | August | November | |
| CREA | 6.5 | 5.4 | 4.2 |
| BUN | 66 | 52 | 49 |
2. I began noticing small, positive shifts in his daily energy
✔ The first moment his guardian could finally breathe a little easier
More than the numbers on the page, what mattered most to me was seeing Soommu's energy begin to return.
About a week after starting the program, I finally had a moment where I could breathe a little easier. Instead of hiding in the corner the way he often did when he wasn’t feeling well, Soommu quietly climbed back onto my lap again.
From this point downward, only the English conversation is shown because the full image is too long. The original Korean conversation can be found at the very end.
✔ A burst of daily energy
About two weeks later, I began to see not just stability but a gradual improvement in how active and responsive he seemed day to day.
When his energy was low, he didn’t even have the strength to join in little playful tussles, but now he had enough spirit to playfully land a few firm paw taps on our younger dog again.
3. Gradual weight gain from 4.1 kg to 4.8 kg
Over time, his weight slowly became more stable, step by step.
✔ Getting through the rough patch: “I’ll get him to eat, even if I have to toss the food” (July)
When we first started the scheduled feeding plan, his weight dropped to 4.1 kg during the adjustment period.
That was when I began looking for ways to wake up the food instincts he had from his days as a stray cat, so he would feel like eating again.
✔ Gradual recovery: my morning records from August to September
His weight did not come back overnight.
Every morning I weighed him before breakfast and kept going, fighting for every 10 grams.
✔ Maintenance phase: “4.9 kg is too much, we stop at 4.8 kg” (October–November)
By the end of October, his appetite had really taken off and his weight briefly reached 4.9 kg. That was when the Greycoat team gently reminded me to tap the brakes.
They explained that excessive weight gain can strain a kidney patient's body rather than help.
✔ Rapid Weight Gain Alert (October 25–28)
When his weight crept past 4.8 kg and briefly reached 4.9 kg, I took it as a clear sign to start adjusting his portions right away.
✔ Keeping him at 4.8 kg (October 30 to November 11)
During this period, I fine-tuned his food portions in 5 g steps, and over time his weight settled comfortably in the 4.8 kg range, where he seems to feel his best.
4. His fur started to grow back
As his nutrition felt more balanced and his body seemed to handle things more smoothly,
I began to notice changes even in his fur.
The rough, thin areas started to fill in, and his coat became thicker and softer again.
Since we started the Greycoat care, his fur has been growing so fast again – actually even more than before.
5. Why I think Soommu was able to regain stability
✔ Consistent meal management
On days when he did not want to eat, I stayed patient and kept trying until he finished his planned portion, whether that meant tossing small pieces toward him or gently hand feeding him.
✔ Immediate communication
I shared every small change with my care manager, from a little vomiting or a change in his nose color to funny stories about him swatting his younger sibling.
✔ Carefully following the guidance
When they advised, “Please do not increase his weight any further” or “Please do not let your guard down,” I followed their guidance as carefully as I could, day after day.
6. Soommu’s daily feeding schedule
Soommu followed this detailed schedule every single day without missing one.
I believe these small, consistent habits are what slowly built the stable days we have now.
| Session | Time | What is given | Notes |
| Morning | 8:30 | Prescription medicines for high blood pressure and nausea | |
| Greycoat Appetite (planned launch in January 2026) | 1 capsule | ||
| 30 minutes later | Breakfast plus sevelamer phosphate binder plus pancreatin digestive enzyme | ||
| Right after meal | Renamedin | ||
| Lunch | 13:00 | Dr. Toru Protocol | 1 capsule |
| Greycoat Calm | 1 capsule | ||
| 10 minutes later | Intensive Protocol | 1 capsule | |
| Dinner | 20:20 | Probiotics Protocol | 1 capsule |
| Greycoat Appetite (planned launch in January 2026) | 1 capsule | ||
| 20:30 | Dinner plus sevelamer phosphate binder plus pancreatin digestive enzyme | ||
| Right after meal | Renamedin | ||
| Before bed | Dr. Toru Protocol | 1 capsule | |
| 30 to 60 minutes later | Custom capsule for Soommu | 1 capsule |
7. Let’s hang in there for ten more years.
For Soommu, the past 128 days were not about rapid change, but about slowly building stability that led to positive results.
The Greycoat Program focuses on daily management rather than diagnosis or treatment.
We design meal and supplement schedules that fit each household's rhythm.
We also provide consistent feedback so guardians don't have to face this alone.
As in Soommu’s case, we hope that many small, steady changes can come together to make a cat’s everyday life a little more comfortable.
Where to Find Soommu’s Full Story
You can read more about Soommu’s kidney care journey on his Instagram.
Conversation Log with Soommu’s Guardian
The following conversation is the original, unedited exchange between Soommu’s guardian and our team.
Through an instant messaging app, we quickly shared updates on his condition and adjusted his care routine accordingly.
