Clinical judgment required. This calculator is a decision-support tool, not a substitute for veterinary consultation.

Feline Grimace Scale (FGS)Feline

Feline Grimace Scale (FGS) pain assessment for cats. Evaluates five facial action units — ear position, orbital tightening, muzzle tension, whisker position, and head position — each scored 0 to 2. Total score above 4 out of 10 indicates pain requiring rescue analgesia. Validated, reliable tool for assessing acute pain in cats during post-operative recovery, hospitalization, and clinical examination. Used for feline pain scoring, cat pain assessment, deciding when to administer pain medication, and monitoring analgesic efficacy. Common query: 'is my cat in pain' or 'feline pain score'.

Ear position

Orbital tightening

Muzzle tension

Whisker position

Head position

FGS Score

0/10

0 /10

5 /10

Low

High

Low—0 /10

Pain unlikely — no intervention needed