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Following various studies, it has been found that the sources of Se toxicity in domestic animals are soil, water, feed supplements, fodders grown on selenium‐rich soil, etc. The Se levels in different food sources of different country are shown in Table 4.1.

Table 4.1 Presence of Se (mg/kg) in different foods of different countries.

Food
Country	Cereals (mg/kg)	Meat (mg/kg)	Dairy food (mg/kg)	Vegetables (mg/kg)
India	0.23–1.64a	–	0.01–0.09b	0.92–1.34a
Australiac	0.01−/0.31	0.06–0.34	</0.001–0.11	</0.001–0.022
U.K.d	0.11	0.12–0.6	0.01–0.085	0.005–0.01
U.S.d	0.3–0.56	0.06–1.33	0.006–0.3	0.004–0.07
Canadad	0.01	0.06–1.22	0.005–0.01	0.005–0.01
Finlandd	0.02	0.05–0.48	0.002–0.025	0.002
New Zealandd	0.035	0.03–0.38	0.004–0.025	0.003

^a Dhillon and Dhillon (1991).

^b Giri (2019).

^c Australia (Tinggi et al. 1992; Tinggi 1999; Tinggi and Conor Reilly 2001).

^d Combs (1988).