But the horse is not changing species. It is still a horse before and after its immmune system adapts.
No offence intended or implied.
Sometimes, I may state religious views just to force people to think! As a Freeper, would you expect anything less?
Your point is a good one. The example I gave is but a nanosecond in the evolution of the horse. Actually, fossil records for horses are quite contiguous. The modern horses hoof is actually its middle fingers, finger nail. Some semblance of former digits are still observable. However, since the modern horse did not exist in North America until the Spanish conquest the fossil record is not contaminated with equivocal evidence. The skeletal development of the horse in North America is quite complete and progressive. The horse evolved from the size of a small dog to that of a horse. It isn't announced in a chapter in Genesis, but it's good enough for me.