hi, one of my friends , well, her husband, raises chickens for perdue, she is gonna give me 3 pullets, to put with my small flock, i have 2 white leghorn hens, & 2 cornish x hens & a big RIR roo all of those are a yr. old & the hens lay very well!, will these chickens also lay eggs? i believe they are meat chickens, i also have some babies (silkies & barred rocks)in the brooder, anything else i should know about?? oh, i am gonna put the new pullets in a separate pen, for a week or so, so as to quarantine them, my friend says i dont need to do that , because her chickens are very "up to par"very strict standards with perdue, vaccinated & all, what due you experts think??