Signs Your Pet Is Sick

Published on April 19, 2025

Knowing when your pet is sick can save their life and spare them discomfort. As a pet owner, I’ve learned to spot subtle changes in my dog and cat’s behavior over the years, and I want to help you recognize the signs early. Acting quickly can prevent minor issues from becoming serious, something I’ve experienced firsthand when my dog’s lethargy turned out to be an infection.

Look for lethargy first—my dog used to nap all day, which was unusual for her active nature, signaling a problem. Loss of appetite is another red flag; my cat skipped meals for two days before I noticed, leading to a vet visit for a dental issue. Vomiting or diarrhea, especially if persistent, needs attention—I once found my dog throwing up bile, and it was due to eating something off the street. Excessive thirst or urination can indicate diabetes or kidney issues; my neighbor’s cat drank more before a diagnosis. Hiding or aggression might mean pain—my cat hid under the bed, and a vet found an abscess. Check for changes in grooming; my dog stopped licking her paws, revealing an injury.

Physical signs matter too. Pale gums, a rapid heartbeat, or labored breathing are emergencies—I felt my dog’s gums turn pale once and rushed her to the vet. Runny eyes or nose, like my cat’s recent cold, suggest respiratory issues. Lumps, limping, or hair loss need a checkup; I found a small bump on my dog that turned out benign but required monitoring. Weight loss despite normal eating can hint at parasites or thyroid problems, something I caught early with my cat’s vet check. Keep a log of these signs to spot patterns, and use our Activity Planner to track their routine for deviations.

Act fast if you notice these signs. I keep a pet first-aid kit with a thermometer—normal dog temp is 101-102.5°F, cat is 100-102.5°F—and check it if she’s off. Isolate them from other pets to avoid spread, and avoid home remedies without vet advice; I tried chicken soup once, but it didn’t help my dog’s upset stomach. Call your vet with details—duration, severity, and other symptoms. Regular checkups catch issues early, and I schedule mine biannually. Every pet is unique, so trust your instincts, and don’t hesitate to seek professional help if something feels off.