What is very interesting with the word "flocks" and "cattle" etc. is that in the bible you will find different words used, in the Hebrew especially, which gives another higher meaning to some flocks, ie, believers.
Here it is (All my books have migrated from the Shelves to the floor around my computer) BaQaR hard of large animals, Ts'N (where ' is an Aleph - pronounced like the "h" in honor) The second word is used for Isreal in the Psalms (I think). The One flock one shepherd line 10:16 is really "one (bunch o') herdee(s), one herder."
And shepherd, (Dictionaries are addictive) is only used once, in Ephesians, to denote a leader of a congregation.
well I had to type most of that twice because the little cat sneaked under the door(1) and decided he wanted to learn how to type. If the door won't keep him out, the better part of valor .....