Table 1. Mean concentrations ± SEM of dopamine by horse breed

	Breed and number of horses
	Thoroughbred (n = 13)	Pony (n = 9)	Warmblood (n = 4)	Haflinger (n = 5)
Dopamine (pg/mL)	8.3 ± 1.65	7.9 ± 1.51	16.4 ± 3.65	7.3 ± 2.10