We have all at some point realized, though Goofy and Pluto are both dogs, Goofy has a little more going on. He wears clothes, stands upright, and goes skiing, while Pluto wears a collar and lives in the yard.
This may seem like a single oversight by the Disney team
HOWEVER
There is precedent to say that these arbitrary distinctions are more the rule than the exception.
Here are 5 examples of Sentient Vs. Non-Sentient Disney Animals
1. Beauty and the Beast
In a film overrun with talking items, there is a pair of animals with opposing amounts of human characteristics.
Phillipe the Horse
These Straight Up Wolves
2. The Rescuers
In a movie about talking mice, you'd expect a little more consistency.
Evinrude the Dragonfly
Bats!
3. The Rescuers Down Under
13 years separate this sequel from the original. Apparently that is not enough time to clear up these incongruities.
Marahute the Eagle
Wilbur the Albatross
4. The Lion King
Even in Pride rock there is confusion as to which animals are important enough to think, and it can all be summed up in one, major, life altering scene: The Stampede.
The Wildebeests
Simba
5. Aladdin
Here we might have the most egregious violation of the distribution of animal anthropomorphism. The examples will be offered from "least sentient" to "talking bird."
Rajah the Tiger
Abu the Monkey
And finally...
Gilbert Gottfried
Next time we'll talk about who has to wear pants.