Actually, this is a straw man arguement. The exact limits of a biblical "kind" are not likely to correspond exactly to the current classification schema, although it is likely to be similar. You have assumed that all of these variations would be lumped together in a "dog kind" and that only one pair of these invented "dog kind" was on the ark. For example, it is not possible to determine that there was not a dog pair and a jackal pair on the ark. The concept of a "kind" makes sense on a generic level (a dog is not a cat) but is hardly defined rigourously in Scripture. This is an area ripe for further investigation, especially given modern understanding regarding chromosomes, etc.
I mean a strawman argument in that *he* defined a precise definition of "dog kind" and then poked holes in it as if it were commonly accepted to that level of detail. Yes "dog" is a commonly used example of a "kind", but the precise definition is not rigourous.
-lee-
What's not rigorous?
1. Since God "commanded" all animals to breed according to their kind, all viable hybridizing species have to belong to the same kind. ("Commanded" in quotes because I believe that it is more accurate to read those as a phenomenological description of observed biology, rather than as a imperative command of God.) Wolves, dogs, coyotes, and jackals are all able to produce hybrids, even if they are sterile. Therefore they belong in the same kind.
2. Gish and Wieland also lump them together in one kind. You can argue with them if you want.
3. The Bible says clearly: Take with you seven of every kind of clean animal, a male and its mate, and two of every kind of unclean animal, a male and its mate, and also seven of every kind of bird, male and female, to keep their various kinds alive throughout the earth.
(Genesis 7:2-3 NIV) Indeed, if the requirements are extended to take more than one kind, then the Ark runs into serious space and food problems.
4. The genetic divergence between members of the "same kind" is too wide for mutation to have derived from a single ancestral pair approx. 4.5 kya.
Where have I gone wrong? If you want to separate them into separate kinds, you will have to explain the hybridization occuring between the different kinds. One piece of information I did not include (you might know why) is that with mtDNA studies, wolves exhibit
more than 7% divergence from jackals. If evolution can't produce 5% divergence between chimps and humans in 5 million years, why should we expect it to produce 7% divergence between wolves and jackals in 0.1% of that time?