Emergency triage page · Week 2 hub · vet-review-ready draft

Cat Not Eating After Surgery: When to Call or Go Back

Short answer

If your cat is not eating after surgery and is vomiting repeatedly, weak, collapsed, breathing abnormally, bleeding, has pale gums, has a swollen or painful incision, cannot urinate, has diarrhea, or seems severely painful, contact an emergency vet or the surgical clinic now. VCA's post-operative instructions note that some cats experience nausea after general anesthesia and that smaller meal portions may reduce nausea and vomiting, but ongoing refusal to eat should not be ignored. Merck Veterinary Manual explains that feline hepatic lipidosis is a potentially lethal liver disease associated with poor appetite or food deprivation, especially in overconditioned cats. Call your surgical team today if your cat skips food, eats much less than expected, refuses prescribed medications, or seems nauseated. Do not give human pain medicine, stop prescribed medications without guidance, force-feed a distressed cat, or use supplements as a substitute for post-operative reassessment.

Emergency Decision Table

Urgency tier	What you see	What to do
Go now	Not eating plus repeated vomiting, abnormal breathing, pale gums, collapse, bleeding, severe pain, incision swelling/discharge, cannot urinate	Emergency vet or surgical clinic now.
Call today	Eating much less, refusing meds, mild nausea, hiding, no appetite by expected discharge timeline	Call the surgical team today.
Monitor with vet guidance	Mild appetite dip specifically covered in discharge instructions and improving	Follow discharge plan exactly.

Main Guide

Post-surgery appetite changes can happen, but they should be judged against the discharge instructions for that procedure and that cat. VCA notes some cats experience nausea after general anesthesia and may do better with smaller portions. VCA also emphasizes following post-operative instructions and using prescribed medications as directed. Merck's hepatic lipidosis guidance explains why prolonged poor intake in cats deserves attention.

Go now if not eating is paired with repeated vomiting, breathing difficulty, pale gums, collapse, uncontrolled bleeding, severe pain, inability to urinate, seizure, heat exposure, or incision problems such as marked swelling, discharge, opening, odor, or sudden pain.

Call today if your cat skips meals, eats less than the discharge plan expects, refuses medications, hides continuously, drools, seems nauseated, or has no bowel movement or urination concerns. The surgical team may adjust pain control, nausea control, feeding instructions, or recheck timing.

What not to do

do not give human pain medicine; do not stop antibiotics or pain medication without calling; do not remove the cone unless told; do not force-feed a cat that is vomiting, distressed, or not swallowing normally; do not use supplements instead of calling.

What your vet may check

pain, nausea, hydration, incision, temperature, medication side effects, urinary output, constipation, infection, and whether nutrition support is needed. Vet approval required.

How to describe post-operative appetite

compare your cat's intake with the discharge instructions. Tell the clinic whether your cat ate the first night, refused breakfast, vomited medication, hid from food, or seemed interested but stopped after a few bites. Mention whether the procedure involved the mouth, abdomen, urinary tract, dental work, or a painful wound, because the surgical context changes what the clinic will ask next.

Why not to wait

the cause of not eating after surgery may be nausea, pain, medication effects, stress, incision complications, urinary issues, fever, or an unrelated disease that became visible during recovery. VCA notes nausea can occur after general anesthesia, but Merck's hepatic lipidosis guidance supports taking prolonged poor intake seriously in cats. Calling early gives the surgical team a chance to adjust the plan before appetite loss compounds recovery.

Vet Call-Prep Checklist

Surgery type, date, discharge instructions, and clinic contact.
Last food and water intake; what was offered.
Vomiting, stool, urination, incision appearance, pain signs.
Medications prescribed, doses given, missed doses.
Photos of incision if safe.
Cone/recovery suit use and activity level.

Recovery Support Section

After the surgical team assesses your cat, recovery support may include small meals, prescribed nausea or pain medication, hydration monitoring, incision protection, and nutrition support. Alfavet convalescence nutrition can be discussed only after veterinary approval and must not replace pain control, anti-nausea care, antibiotics, surgical recheck, or feeding-tube planning when needed.

FAQ

Is it normal for a cat not to eat after anesthesia?

Some nausea can occur, but ask your surgical team what is expected for your cat and call if intake is poor.

Can I skip pain medication if my cat will not eat?

Call first. Do not change prescribed medication without guidance.

Should I force-feed?

Not if your cat is distressed, vomiting, or resisting. Call the vet.

When is incision swelling urgent?

Marked swelling, discharge, opening, bleeding, odor, or severe pain needs prompt veterinary contact.

Internal Links

External Citations

VCA post-operative instructions in cats; Merck feline hepatic lipidosis; Merck emergency evaluation.

Vet-Review Flags

Approve post-anesthesia appetite timing, medication guidance, incision warning signs, and convalescence product wording.