Home Care During Chemotherapy
Practical guidance for looking after your pet between treatment sessions. Most pets tolerate chemotherapy well, but knowing what to expect — and when to act — helps you stay calm and keep them comfortable.
When to Call the Emergency Vet
Do not wait — contact an emergency veterinary clinic immediately if you observe any of the following.
- Sustained vomiting or diarrhoea — more than 3 episodes in 24 hours
- Blood in vomit or stool
- Collapse or inability to stand
- Difficulty breathing or rapid, laboured respiration
- High fever — above 39.5 °C / 103.1 °F (rectal)
- Suspected infection in a neutropenic pet (e.g. fever, lethargy, or poor appetite during the nadir window — typically 7–10 days post-treatment)
Safety
Safe Handling of Waste
For 48–72 hours after each treatment, chemotherapy drugs are excreted in your pet's urine, faeces, and vomit. Taking a few simple precautions protects everyone in the household.
Wear disposable gloves
Use them whenever you clean up urine, faeces, or vomit. Dispose of gloves after each use.
Double-bag and bin
Place soiled material in two sealed bags and put them in your normal waste bin — not the compost.
Wash hands thoroughly
Even if you wore gloves, wash your hands with soap and warm water afterwards.
Wash bedding separately
Launder pet bedding, bowls, and any soiled fabric separately from the household wash.
Important: Pregnant individuals and immunocompromised people should avoid direct contact with your pet's waste during this window. If this is not practical, double-gloving and immediate hand-washing are essential.
What to Watch For
Side effects from veterinary chemotherapy are usually mild, but it helps to know which signs are urgent and which can wait. Use this three-tier guide.
Call the emergency vet now
See the emergency checklist above for the full list — including sustained vomiting or diarrhoea, blood in vomit or stool, collapse, difficulty breathing, high fever, and signs of infection during the neutropenic nadir. If in doubt, call.
Call the clinic next morning
- Reduced appetite lasting more than 24 hours
- Mild lethargy — less active than usual but still responsive
- A single episode of vomiting
- Noticeable changes in water consumption
Monitor and mention at next appointment
- Mild coat changes (thinning, texture change)
- Slight behaviour change (e.g. more clingy or withdrawn)
- Minor digestive variation (softer stools, occasional gurgling)
Appetite and Nausea
A temporary dip in appetite is one of the more common side effects. In most cases it resolves within a day or two. Here is what you can do at home:
- Offer small, frequent meals rather than one or two large ones.
- If your pet seems nauseous, try a bland diet — boiled chicken and white rice (dogs) or plain cooked chicken (cats) — for a day or two.
- Never force-feed. If your pet turns away, remove the bowl and try again later.
- Keep fresh water available at all times. Some pets drink more during treatment; others drink less. Both are worth noting.
Do not give anti-nausea medications unless they have been prescribed by your veterinary team. Over-the-counter options can interact with chemotherapy drugs.
Medications at Home
Never give over-the-counter medications — including NSAIDs (e.g. ibuprofen, meloxicam), paracetamol/acetaminophen, or antihistamines — without explicit approval from your veterinary oncologist. Many of these drugs interact with chemotherapy agents or affect organ function that is already under stress.
Critical — cat owners: Paracetamol (acetaminophen/Tylenol) is fatal to cats at any dose. Never administer it under any circumstances.
If your pet seems uncomfortable and you are unsure whether a particular medication is safe, call your oncology clinic before giving anything. They would always rather you checked first.
Keeping Records
A simple daily log is one of the most useful things you can bring to each appointment. Your oncologist uses these observations to adjust dosing, manage side effects, and assess quality of life.
Food intake
How much eaten, any refusals
Water intake
More, less, or normal
Energy level
Active, resting more, lethargic
GI symptoms
Vomiting, diarrhoea, or normal
A notebook, a notes app on your phone, or even a simple spreadsheet all work well. The format does not matter — consistency does.
Returning to Normal Activities
Most pets can continue gentle walks and normal household activity throughout treatment. Keeping a sense of routine is good for both of you.
The main exception is during the nadir — the period when white blood cell counts are at their lowest, typically 7–10 days post-treatment for most protocols. During this window, your pet's immune system is less able to fight infection. Ask your oncologist whether exercise restrictions or reduced contact with other animals are appropriate during your pet's nadir.
Tip: If your pet seems keen to play or walk, let them set the pace. Short, relaxed outings are almost always better than enforced rest — unless your vet has said otherwise.
Home care guidance on this page is informed by the American College of Veterinary Internal Medicine (ACVIM) consensus guidelines on safe handling of chemotherapy agents and supportive care in veterinary oncology patients.