'rearing flocks' is correct and usable in written English.
It can be used to refer to the act of raising animals, usually for their meat, wool, milk, or eggs. For example: "The rancher spent his days rearing flocks of sheep on his farm."
Blood and fecal samples of rearing flocks are tested (8, 11 ), and infected flocks are destroyed.
The farms were managed similarly as part of the same integrated broiler company under good hygiene practices, rearing flocks of 40,000 60,000 birds with an average age at slaughter of 38 42 days.
Essential to success is a sufficiently sensitive testing program in the breeding and rearing flocks as well as in the hatcheries, i.e., one that involves intensive sampling and a combination of serologic and bacteriologic testing methods (Table 1).
Among the 41 flocks, 29 were broiler flocks, one was a rearing flock while the remaining 11 flocks were table layers (6 flocks on deep litter, 4 organic flocks and 1 free range flock).
For an integrated poultry meat farm, for example, these phases could include rearing the parent flock, breeding, hatchery, brooding and fattening commercial chicks, slaughtering and meat processing.
Of particular interest were risk factors associated with bird husbandry which could possibly be altered when rearing future flocks.
A three-year survey (1997 99) was carried out on organically reared sheep flocks throughout Sweden.
Recently, a large-scale survey was completed that was aimed at determining the prevalence and intensity of nematode infections in organically reared sheep flocks throughout Sweden [ 12].
Such information is essential for the development of rational advice, which can be used by farmers to manage nematode parasite infections in organically reared sheep flocks in Sweden.
There are few other reports of on-farm prevalence of Campylobacter among domestically reared duck flocks, but one found rates to vary from 2.5% to 60% at 69 84 days of age and another recorded 100% colonization at 8 days of age (Kasrazadeh and Genigeorgis, 1987; McCrea et al., 2006).
Prevalence of piroplasms was also investigated in a second group of 80 sheep from 16 flocks reared in mountain areas that had been heavily exposed to ticks and had suffered a recent abortion episode (Study II).
