Table 1.

Description of the gingival index (GI) used to evaluate cats.

Gingival index	Description
GI 0	When the gingiva was normal (absence of inflammation, no bleeding)
GI 1	When there was mild inflammation, including slight erythema, minimal superficial alteration, and no bleeding on probing
GI 2	When there was moderate inflammation, including erythema, and delate bleeding on probing
GI 3	When there was a severe erythema and swelling, tendency to spontaneous bleeding, possible ulceration, and spontaneous bleeding on probing