Table 2. Comparison of auricular temperature to rectal temperature in canines with and without physical activity. The same digital thermometer was used within each study to measure auricular and rectal temperatures. There is low correlation between the axilla and rectal temperature readings among the two studies.

Study: Auricular	Subject	Female/Male	Time of day	Rectal °C	Auricular °C	r2	Exercise/Rest	Device used: Rectal	Device used: Auricular
Zanghi, 2016	16 Labradors 16 Beagles	16 Male 16 Female	9:00 am	38.3 ± 0.5	38.4 ± 0.6	0.615	Rest	Digital thermometer	Pet-Temp PT-300
			11:30 am	38.1 ± 0.5	38.1 ± 0.5	0.615	Rest	Digital thermometer	Pet-Temp PT-300
			12:30 pm	38.0 ± 0.4	37.7 ± 0.6	0.615	Rest	Digital thermometer	Pet-Temp PT-300
			4:30 pm	38.0 ± 0.5	36.9 ± 1.0	0.615	Rest	Digital thermometer	Pet-Temp PT-300
			Pre-exercise 30 minutes	38.3 ± 0.5	37.5 ± 0.8	0.615	Exercise	Digital thermometer	Pet-Temp PT-300
			Post exercise 0 minutes	39.7 ± 0.9	39.2 ± 1.1	0.615	Exercise	Digital thermometer	Pet-Temp PT-300
			Post exercise 15 minutes	38.8 ± 0.7	38.4 ± 0.6	0.615	Exercise	Digital thermometer	Pet-Temp PT-300
			Post exercise 30 minutes	38.3 ± 0.6	37.9 ± 0.7	0.615	Exercise	Digital thermometer	Pet-Temp PT-300
Sousa, 2016	88 Canines	N/A	N/A	38.8 ± 0.4	39.0 ±0.5	0.343–0.372	Rest	Digital thermometer	Human IR auricular thermometer
Hall et al., 2019	187 canines	74 females 113 males	N/A	N/A	36.6°C–38.8°C	N/A	Rest	Unspecified	Vet-Temp VT-150 Instant Ear Thermometer
	24 canines	15 males 9 females	N/A	pre-exercise: 38.3 ± 0.39 post exercise: 39.0 ± 0.41	pre-exercise: 37.9 ± 0.53 post exercise: 38.6 ± 0.50	N/A	Exercise	Vicks Comfortflex Digital Thermometer	Vet-Temp VT-150 Instant Ear Thermometer