Table 4. Some examples with specifications for commonly used commercial trout feeds, United States of America (USA).*
Brand name	Manufacturer	Country of origin	Life Stage	Fish size (g)	Feed type/specification	Feed/pellet size (mm)	Proximate composition (%)							SGR�	FCR
							Moisture (max)	Crude Protein (min)	Crude fibre (max)	Carbohydrate (max)	Ca (range)	P (range)	DE (kJ/g) (min)	(%/day)
Silver Cup	Nelson and sons	USA	fry	0.1�1.0	Crumble	0.44�0.59	10	48	3	17	2	1.2	14.1	4	1
Silver Cup	Nelson and sons	USA	fingerling	1.0�15.0	Pellet	1.5�2.0	10	45	3	20	2	1.2	13.2	3.5	1
Silver Cup	Nelson and sons	USA	grower	15�1 000	Pellet	2.0�5.0	10	40	3	25	1.8	1	13.2	2.5	1.2�1.4
Starter	Rangen	USA	fry	0.1�1.0	Crumble	0.44�0.59�	10	55	3	17	2.2	1.4	14	4	1
Trout grower	Rangen	USA	fingerling	1.0�15.0	Pellet	1.5�2.0	10	45	3	20	2	1.2	13	3.5	1
Extr 400/450	Rangen	USA	grower	15�1 000	Pellet	2.0�5.0	10	41	5	25	2	1.2	15	2.5	1.2�1.4
*USA has been used as an example; formulations can be different in other countries depending on regulations and availability and relative prices of ingredients.