Incidentally, concerning the sheep/goats parable, I posted some research here (my post # 487) and here (my posts # 267 & 272).
Concerning differences between sheep and goats, the commentary I mentioned above has this to say (pp.961-2):
The motif of an ultimate division between the saved and the lost has recurred in many different contexts in this gospel [Matthew]; see especially 7:13-27; 8:11-12; 10:32-33; 13:40-43; 49-50; 16:25-26, and the whole of 24:36-25:30. . . In the Middle East sheep and goats were (and are) often pastured in mixed flocks. The sheep, though generally lighter colored than goats, are not predominantly white as the flocks familiar to us; some are brown, and some have substantial dark patches (even when clean!), so that it can take a practiced eye to distinguish the two species. 87 The purpose of seperating the two is not clear, but it is the process, not its purpose, which is the point of the simile. The imagery provides a memorable illustration of the final division of people who have up that point lived together indistinguishably - cf. the imagery of the wheat and the weeds (13:29-30) or of the silly and sensible girls (25:1-12). To other people (and even to themselves, vv. 37-39, 44?) the saved and the lost may look very similar; it takes the expertise of the "king" to know which is which. The righthand side often signifies the place of favor, so that the left is comparatively that of disfavor.
Footnote 87 reads:
The close link between the two species is shown by the fact that some languages, such as Tamil, use the same word for both.
[End of quote]
A point of interest in the commentary is the note that "it is the process, not its purpose, which is the point of the simile [concerning the seperating of the sheep and goats]." That is, the first part of the parable is highlighting the seperating process.
If that view is accurate, the WT idea that the parable takes place during the great tribulation, when sides have already been chosen, is bogus.
Take Care