Inflammatory bowel disease (IBD) is manageable in a home, and the cats that do well are the ones whose owners keep 3 numbers. Take the cat only if you can hold a strict 8-week diet trial, weigh weekly, and show up for a recheck every 3 months. Budget 400 to 1,200 a year. Every drug in this condition, including steroids and cobalamin injections, is given by veterinary prescription with the dose set at the clinic.
The hard part is not the medicine. It is the 8 weeks of no treats, no table food, and no shared bowls with another cat, because a single lapse resets the trial clock.
Why the Trial Runs 8 Weeks
Food-responsive disease in cats often improves between week 3 and week 6, and the full response can take 8. A 4-week trial produces false negatives in a large share of cases, then the cat is labelled refractory and put on steroids for life when a diet change would have held it.
Rules for the 8 weeks: 1 protein source or 1 hydrolysed diet, 100 percent of intake, water only between meals, treats replaced by 2 or 3 pieces of the same kibble, and no dental chews. Weigh on day 0, 14, 28, 42, and 56. Phone the clinic at week 4 with the weight and a stool score; book the in-person visit for week 8.
The 3 Numbers You Track
Number 1 is weight, every 7 days, same scale, same time of day. A 4 kg cat that loses 200 g in 2 weeks is losing 5 percent of body weight, which is the threshold where muscle loss starts and the diet plan needs review.
Number 2 is stool score, once a day, on the 1 to 7 scale used in most clinics: 1 is hard pellets, 2 is firm and segmented, 3 is firm and log-shaped, 4 is soft but formed, 5 is a pile that loses shape, 6 is liquid with texture, 7 is water. The target on a working diet is 2 to 3 for 5 days out of 7. Number 3 is intake in kcal per day, from the label, totalled weekly: a 4 kg cat needs 180 to 220 kcal, split into 4 small meals rather than 2.
Every 3 Months at the Clinic
A 3-month recheck is the standard interval for a stable IBD cat, and it compresses to 4 to 6 weeks during a flare. Each visit covers 4 items: weight and body condition score (BCS) against the last value, a blood panel with cobalamin and folate, a stool check if the score has been 5 or above for 3 days, and a review of the food log. Cats with low cobalamin often need supplementation by injection, at a schedule your vet sets and adjusts on the repeat blood value.
Ask for the numbers in writing each time. Three consecutive rechecks with a stable weight, a stool score of 2 to 3, and normal cobalamin is the point where many vets widen the interval to 4 or 6 months.
| Diet type | Trial weeks | Cost per month | Best for | Watch for |
|---|---|---|---|---|
| Hydrolysed protein | 8 | 60–110 | first trial, unknown trigger | palatability, 10–20% refusal |
| Novel single protein | 8 | 45–90 | known trigger, cooperative eater | cross-contamination at home |
| High-fibre, low-fat | 6–8 | 35–70 | large bowel signs, weight gain risk | bulk, 2 to 3 stools a day |
| Home-cooked, vet-formulated | 8 | 90–160 | multiple failures, owner has time | calcium and taurine gaps |
Medication, and What You Do Not Decide
Steroids, budesonide, cobalamin injections, and anti-nausea drugs are all veterinary decisions, and the dose changes with weight, bloodwork, and response, so no number belongs in your notes. What you do control is the food, the timing, and the record. Ask 3 questions at every recheck: what is the current dose, what is the plan for tapering, and which value triggers the next change.
Never start or stop a steroid without the clinic, and never split a dose to stretch a supply. A cat on steroids also needs indoor-only access, since immunosuppression plus an outdoor cat is a bad combination; screen checks matter more than usual, and the checklist is in window and screen safety.
What a Year Costs
| Item | Low | High | Frequency |
|---|---|---|---|
| Prescription or hydrolysed food | 420 | 1,320 | monthly |
| Recheck visit | 50 | 90 | every 3 months |
| Blood panel with cobalamin | 90 | 220 | every 3 months |
| Medication, if prescribed | 0 | 360 | varies |
| Ultrasound, first year | 150 | 400 | once or twice |
The quoted range of 400 to 1,200 a year assumes food at the low end or a cat that stays on 1 diet with no flares. A cat that needs an ultrasound and 2 extra visits in year 1 lands nearer 1,400 to 1,900, so keep 400 aside as a flare fund. A yearly estimate for a healthy cat sits near 300 to 600 for comparison.
Judging a Shelter Cat With IBD
Ask for 5 things: the diagnosis date, the diet the cat is on now, the last 3 weights, the last blood panel including cobalamin, and whether the cat has had a flare in the past 6 months. A cat with 3 stable weights 30 days apart and a stool score of 2 to 3 is a different proposition from one whose weight has dropped 400 g since diagnosis.
If the records are thin, take the cat on foster for 60 to 90 days and keep the same 3 numbers yourself. That period also tells you whether the cat will eat a hydrolysed diet at all, which is the single biggest reason adoptions of IBD cats fail. The handover route is in the foster-to-adopt guide and the running cost calculator is at the cost page.
Go to the Vet Within 24 Hours If
- Vomiting 3 or more times in 12 hours, or any vomit with blood.
- No stool for 48 hours with straining, or 3 or more liquid stools in a day.
- Weight down 200 g or more in 14 days.
- Refusing food for 24 hours, which in a cat risks fatty liver within 3 to 4 days.
- Any yellow tinge to the gums, ears, or the whites of the eyes.
First 30 Days at Home
Keep the cat on the shelter diet for the first 14 days, then start the 8-week trial on day 15 only if the cat is eating reliably. Weigh on day 1, 7, 14, 21, and 28, and score every stool. Book the week-4 phone check when you book the week-8 visit, and put the 3-month recheck in the calendar on day 1, because the interval that gets missed is the one that was never scheduled.
Terms mentioned in this article
Frequently asked
Can an IBD cat live a normal length of life?
Many do. Cats that stay on a working diet, hold weight within 5 percent of their stable figure, and keep a stool score of 2 to 3 often live into their teens. The ones that struggle are usually cats whose diet trial was cut to 3 or 4 weeks, or whose weight was never tracked between visits.
How much does an IBD cat cost per year?
Plan 400 to 1,200 a year once stable: food at 35 to 110 a month, a recheck every 3 months at 50 to 90, and bloodwork with cobalamin at 90 to 220 per visit. Year 1 with an ultrasound can reach 1,400 to 1,900. Keep 400 aside for flares, since one flare can add 2 visits.
Do I have to give steroids forever?
No, and the decision is the vet's. Some cats taper off after 8 to 12 weeks on a working diet; others stay on a low dose for life. Ask at every recheck what the current dose is and what value triggers the next taper. Never change a dose yourself, because stopping abruptly can trigger a serious flare.
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