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My 4 kg curious cat keeps trying to drink from baby bottles — how do I stop her getting infant formula?

Cats · Emergency guide

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

Short answer

Store prepared bottles in the refrigerator with a secure lid, and never leave a half-finished bottle on the counter — cats can knock them over in seconds. After feeding, rinse bottles immediately in the sink; the sweet smell left in warm water is still attractive. For powder, keep the tin in a high cabinet, not on a low shelf she can jump onto. Train a solid “leave it” by rewarding her with a cat treat when she ignores the bottle. If she does lap some up, watch for vomiting or diarrhoea, which are the most likely signs, and call your own vet if they appear.

Why Is Human Formula a Problem?

Most adult dogs and cats are lactose intolerant to some degree.

Infant formula contains lactose and high levels of minerals like iron, which can be hard for pets to process.

The high sugar and fat content can lead to pancreatitis or gastrointestinal distress.

It lacks the specific nutrient balance required for canine or feline health.

Why speed matters

Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.

Signs to watch for

  • Vomiting and diarrhea (often the primary signs).
  • Abdominal pain or bloating.
  • Lethargy.
  • Loss of appetite.
  • In cases of significant iron ingestion, more severe symptoms like shock are possible but rare from a single exposure.

What to do right now

  1. Call your veterinarian or a poison helpline for guidance based on the amount ingested.
  2. Do NOT induce vomiting unless specifically directed by a professional.
  3. Monitor your pet closely for vomiting, diarrhea, or lethargy.
  4. Your vet may recommend a bland diet and monitoring, or in severe cases, supportive care.
  5. Prevent access to formula powder and prepared bottles.
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.

The step-by-step response, from the first minute to the vet visit, is in our Human Infant Formula Ingestion emergency guide.

Open the full emergency guide: Human Infant Formula Ingestion →