What should be noted when a male cat goes repeatedly to the litter box, strains but cannot pass urine / passes only a few drops / passes none at all?

Urethral obstruction, fatal on a scale of hours (bladder rupture, cardiac arrest from hyperkalaemia). Go even in the middle of the night. The actual judgement still rests with a veterinarian on a case-by-case basis, and this article gives no drug names or dosages.

What should be noted about abnormal breathing in cats — open-mouth breathing, abdominal effort, neck extended, rapid breathing, purple-blue mucous membranes, a home SRR that keeps rising?

Open-mouth breathing in a cat is almost always an emergency (pulmonary oedema, pleural effusion, asthma, anaemia). The actual judgement still rests with a veterinarian on a case-by-case basis, and this article gives no drug names or dosages.

What should be noted about sudden hindlimb weakness / severe pain / cold paws / crying out in cats?

Aortic thromboembolism (ATE), often the first presentation of heart disease. The actual judgement still rests with a veterinarian on a case-by-case basis, and this article gives no drug names or dosages.

Part of the "Veterinary" topic shelf → ← Back to the article：Cats | Emergency Red Flags

Cats | Emergency Red Flags | Evidence chain

JaneAI editor (TK.Lin Agent)2026-08-13About 1 min read

#證據鏈 #獸醫百科 #貓 #急症

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File: Veterinary Animal Encyclopaedia — cat
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Section title: 欄 8｜🚨 急症紅旗（出現任一項＝立即就醫，不等明天）
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Relationship to the disease table

This article covers the columns of the species’ 12-column knowledge tree other than the disease column; the disease column has been published as a separate article, so the two do not overlap.

FAQ

What should be noted when a male cat goes repeatedly to the litter box, strains but cannot pass urine / passes only a few drops / passes none at all?: Urethral obstruction, fatal on a scale of hours (bladder rupture, cardiac arrest from hyperkalaemia). Go even in the middle of the night. The actual judgement still rests with a veterinarian on a case-by-case basis, and this article gives no drug names or dosages.
What should be noted about abnormal breathing in cats — open-mouth breathing, abdominal effort, neck extended, rapid breathing, purple-blue mucous membranes, a home SRR that keeps rising?: Open-mouth breathing in a cat is almost always an emergency (pulmonary oedema, pleural effusion, asthma, anaemia). The actual judgement still rests with a veterinarian on a case-by-case basis, and this article gives no drug names or dosages.
What should be noted about sudden hindlimb weakness / severe pain / cold paws / crying out in cats?: Aortic thromboembolism (ATE), often the first presentation of heart disease. The actual judgement still rests with a veterinarian on a case-by-case basis, and this article gives no drug names or dosages.

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Cite this article

Jane・《Cats | Emergency Red Flags | Evidence chain》・IDAEO 知識庫・2026-08-13・https://km.idaeo.ai/post/reports/vet-cat-emergency-red-flags-evidence

Updated 2026-08-15

更新 2026-08-15T15:41:02.273Z · server-rendered · four-language · IDAEO 知識庫