Table-1.

Description of experimental groups.

Experimental group	Experimental diet	Cu supplementation level
		Total Cu (ppm)	Compared to standard recommendation (%)
T1	Basal diet+ Inorganic Cu	20	100 (Control)
T2	Basal diet+ Organic Cu1	20	100
T3	Basal diet+ Organic Cu	15	75
T4	Basal diet+ Organic Cu	10	50
T5	Basal diet+ Cu-NP2	15	75
T6	Basal diet+ Cu-NP	10	50
T7	Basal diet+ Cu-NP	5	25

¹Copper proteinate,

²Copper nanoparticles