The day it ate fish it was energetic; next day after fish it vomited, no energy for two days; that night let out, back at midnight, worse, by third day limp by the heater, legs weak; orange cat pink nose; near death nostrils black – was it the fish or poison outside?

Cats can eat fish, but spoiled fish or fish with large bones can damage the gut; the cat may have vomited from fish and died from lack of timely treatment. But with outdoor access, eating poison outside causing sudden death cannot be ruled out – only a professional necropsy can conclude.

For pet households, do not ignore mild sickness – intervene and treat early to avoid life danger.