There is no operational difference between micro and macroevolution. It is literally the same process in both. One does not refer to microaddition for small numbers and macroaddition for large numbers for the same reason. They both do the exact same thing. Accepting one is admitting both.
Just because the changes in other animals are slight and rare from the perspective of a human no way precludes their sum over time to yield speciation.
"You underestimate the character of man." | "So be off now, and set about it."