Vets earn more money working with smaller animals rather than large, because it is harder to operate on a smaller animal and it is harder to get an IV in a smaller animal, because it veins are smaller and harder to pin point. Basically everything is harder with a smaller animal, because you aren't used to how small the animal is.
I agree, vets that work with smaller animals only get paid more because there are a lot more smaller animals than big animals, ( that vets actually treat).
I also agree. It is harder to work on smaller animals. Everything is so much smaller on the them and the tools are big so it is much harder.
And they are weaker than big ones so they have to treat them quickly.