Table A1.

Subjective anesthetic depth score in dogs (Modified from Raue et al., [46]). The palpebral reflex was assessed with a cotton swab and the corneal reflex was assessed with sterile saline drops on the corneal surface via syringe.

Anesthetic Plane	Depth Score	Pupil Size	Globe Position	Eye Reflex (P: Palpebral C: Corneal)	Heart Rate, Blood Pressure, Breathing	Third Eyelid Position	Jaw Tone, Body/Limb Movement, or Swallowing
Very light	5	Large or small, moving	Central	P: Active C: Active	Increased, spontaneous, breathing attempts	Retracted	Strong
Medium–Light	4	Large or small	Central or ventromedial	P: Active or mildly depressed C: Depressed	Increased, spontaneous, breathing attempts	Retracted or partially prolapsed	Medium
Medium	3	Small or medium	Ventromedial	P: Depressed C: Partially depressed	Normal	Completely prolapsed	None or barely
Medium–deep	2	Medium	Central	P: Depressed or markedly depressed C: Depressed	Normal or depressed	Completely or partially prolapsed	None
Very deep	1	Large	Central	P: Absent C: Markedly depressed or absent	Depressed	Partially depressed	None