if we can see small changes like this happening, then what is to stop those small changes from continuing so that over a long period of time they add up to larger changes? This is exactly what we see in the fossil record. We do not see fish turning into dogs, but we do see gradual change which becomes significant if we look at strata separated by large timespans.

The creationist who denies this process has to explain where the boundary between "kinds" is. Presumably they believe that these gradual changes have to stop at some point. So where is that point and how is it defined? What is a "kind" and what sort of variation do you accept within a kind? Are birds and dinosaurs the same kind?