Check for dry, sticky, or tacky gums
Gently lift the skin over the shoulders; if it does not snap back quickly, dehydration may be present
Look for sunken eyes
Watch for lethargy or unusual weakness
Notice reduced appetite or refusal to eat
Observe decreased urination or very concentrated urine
Check for panting or rapid breathing
Feel for a dry nose or overall dry mouth
Monitor for constipation
Watch for loss of skin elasticity
Look for a fast heart rate
Seek veterinary care if your cat is vomiting, has diarrhea, or is not drinking water
Seek urgent veterinary care if your cat is severely weak, collapses, or cannot keep water down