Quick Veterinary Answer: No, adult cats should not drink cow's milk. The popular myth that cats love milk overlooks biology: most adult cats lack the enzyme lactase needed to digest lactose, resulting in painful gas, diarrhea, cramping, and vomiting.
Key Toxicity Facts
| Target Animals: | Cats |
| Toxic Principle: | Lactose (disaccharide sugar in bovine dairy) |
| Dangerous Dosage: | Not lethal, but causes significant gastrointestinal distress. |
| Clinical Severity: | Lactose Intolerance / Gastrointestinal Distress |
Symptoms of Ingestion
- Diarrhea within 8 to 12 hours of drinking milk
- Abdominal cramping, gassiness, and vomiting
- Dehydration from chronic loose stools
Emergency First-Aid Protocol
- Provide clean fresh water or specialized veterinary pet milk (Cat-Sip) with zero lactose.
- Do not feed kittens cow's milk—use veterinary Kitten Milk Replacer (KMR).
📞 24/7 Hotlines: ASPCA Animal Poison Control (888-426-4435) | Pet Poison Helpline (855-764-7661)
Frequently Asked Questions
Can cats drink lactose-free milk or almond milk?
Lactose-free milk is gentler, but almond/oat milk offers no nutritional value to carnivores and can upset sensitive stomachs.