Hepatic Lipidosis Recovery: 3-6 Weeks of Tube Feeding

Recovery from hepatic lipidosis is decided by how many calories go in during the first 3 weeks, not by which liver supplement sits on the shelf. A cat with fatty liver needs a feeding tube and 3 to 6 weeks of measured feeding. Cats fed early and fully do well; cats that are coaxed at the bowl for a week and then tubed at day 8 arrive with a worse liver. The 2 things that kill these cats after treatment starts are refeeding syndrome and a tube pulled out too early.

Tube first: weeks, not days

Pick the tube by how long feeding will take. A nasoesophageal tube, 3.5 French, buys 3 to 5 days and suits a cat that will start eating soon; it is placed awake and is easy to pull out. An esophagostomy tube goes in during 10 to 15 minutes of anesthesia, takes blended food without clogging, and lasts the 3 to 6 weeks most of these cats need. A gastrostomy tube is for a cat that vomits on esophageal feeding or needs months of support.

Most cats are tube-fed for 4 to 6 weeks. Removing it at 2 weeks because the cat looks brighter is the most common avoidable relapse.

The calorie ramp, day by day

Resting energy requirement is 70 times body weight in kg to the power 0.75, so a 4 kg cat needs about 198 kcal a day. Start at 50% of that, add 10 to 25% a day, and reach full intake by day 4 or 5. Feed 4 to 6 times a day, and keep each feed at 10 to 15 mL/kg, which is 40 to 60 mL for that cat. Warm food to body temperature: cold food into a tube causes vomiting, and vomiting in week 1 costs a day of progress.

Day	Share of RER	kcal (4 kg cat)	mL per feed	Feeds
1	50%	100	25	4
2	60%	120	30	4
3	75%	150	38	4
4	90%	178	45	4
5	100%	198	50	4

Four electrolytes, five time points

Refeeding syndrome is a drop in phosphate, potassium, and magnesium that follows the insulin surge when calories restart. Check all 4 — phosphate, potassium, magnesium, and sodium — at baseline, 12, 24, 48, and 72 hours, then every 48 to 72 hours while the cat is hospitalized or until 2 normal sets in a row. Watch for phosphate under 2.5 mg/dL, potassium under 3.5 mmol/L, and magnesium under 1.7 mg/dL. Replace potassium at 1 to 2 mEq/kg a day in fluids, phosphate at 0.01 to 0.03 mmol/kg an hour by slow infusion, and give thiamine at 50 to 100 mg a day for the first 3 weeks, since a cat off food for 2 weeks is thiamine depleted.

Liver enzymes every 7 days

Run ALT, ALP, GGT, bilirubin, albumin, and glucose every 7 days at first. Bilirubin usually falls first, over 7 to 14 days, and it is the number that tracks recovery best. ALT often lags 2 to 4 weeks and can even rise in week 2 while the cat improves, which is why a single high ALT is not a reason to panic. Two consecutive panels with falling bilirubin and falling ALP is the signal to stretch the interval to 14 days, then to 30 days.

If bilirubin is higher at day 14 than at day 1, stop and re-image: an obstructed bile duct or a septic focus explains that pattern, and more calories will not fix either.

Refeeding syndrome in plain sight

Weakness, tremors, a wobbly walk, seizures, or brown urine in the first 24 to 72 hours of feeding. Hemolysis from a phosphate crash is the dangerous version, and it looks like sudden pale gums. The prevention is boring and works: ramp slowly, check the 4 electrolytes on schedule, and never let a cat that has not eaten for 2 weeks jump straight to a full day of food in 24 hours.

Tube care that keeps it in place

Flush 5 to 10 mL of warm water before and after every feed, and again every 6 to 8 hours, to stop the tube clogging. Cap it between feeds. Clean the stoma daily and check for redness spreading more than 2 cm, discharge, or a swollen neck. Change the bandage every 3 days, and keep a soft collar on for the first 7 to 10 days, because a cat that scratches the site once usually pulls the tube out. Weigh the cat every 3 days: gaining 30 to 60 g a week is the target after week 1.

Coming off the tube

Test the appetite, do not guess it. Offer food 3 times a day and measure what is eaten. When the cat takes 75% of its resting energy by mouth for 3 to 5 days running, pull the tube; the stoma seals in 3 to 5 days and needs no suture. Keep the collar on for 3 more days and check the site once a day for a week.

When to call the vet

Vomiting 2 feeds in a row, regurgitation after a feed, a seizure or tremor, fever above 39.5 C, fluid or pus at the stoma, jaundice that is deeper at day 7 than at day 1, or any head pressing, drooling, or staring at a wall. Those last 3 are hepatic encephalopathy and need hospital treatment the same day. A cat that cannot see where it is walking also belongs on that list, and the adaptation steps in /health/cat-blindness-adaptation/ matter once the liver is stable.

What to do this week

1. Ask for the tube that matches 3 to 6 weeks of feeding, not a nasal tube sized for 3 days.
2. Weigh the cat, calculate 70 times kg to the power 0.75, and write the day-by-day calorie ladder on the fridge.
3. Book the electrolyte checks at 12, 24, 48, and 72 hours before the first feed goes in.
4. Set a phone alarm for every feed and every 6 to 8 hour flush; missed flushes are the top cause of a clogged tube.
5. Photograph the stoma daily, so a 2 cm change is visible rather than remembered.

Blood pressure belongs in the same visit, since a liver cat that cannot eat is often volume depleted, and the cuff method is spelled out in /health/cat-blood-pressure-measurement/. For how much of this the cat's age explains, /tools/cat-age/ converts years into a human equivalent and puts the 6-week timeline in proportion.

Frequently asked