all = the whole; implying that a part had been withheld.
meat prey: i.e. animals for sacrifice. Not put by Figure of speech Metonymy (of Adjunct), App-6, for food; but put by Figure of speech Synecdoche (of Species), App-6, for sacrificial animals.
open you the windows, &c. Reference to Pentateuch (Gen_7:11; Gen_8:2). App-92.