Check if the gums are dry or sticky instead of moist
Gently lift the skin over the shoulders; if it stays tented and returns slowly, dehydration may be present
Look for sunken eyes
Notice reduced energy, weakness, or lethargy
Watch for decreased appetite
Observe reduced urination or very dark urine
Check for panting or rapid breathing
Feel for a dry nose or thick saliva
Monitor for loss of skin elasticity
Seek veterinary care if the cat is vomiting, has diarrhea, or cannot keep water down
Seek urgent veterinary care if the cat is very weak, collapsed, or not drinking at all