What's to say that feline and canine can't be merged into one class based on similiar features and genetics? Just because they are classed differently doesn't mean a cat can't evolve into a fox or vice versa. Maybe they actually are the same "kind" just classed seperatly.
The point is that the similarities end with the order, Carnivora, the 2 families differentiated into the progenitors of the current families. Each genus within the family differs in the same manner and the individual species the same way. They are merges at the order level and that is where the similarity ends. At the class level they are merged with all other mammals. Percy point this out in his chart of the coelacanth.
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969
Since Evolution is only ~90% correct it should be thrown out and replaced by Creation which has even a lower % of correctness. W T Young, 2008