Acknowledging physiological differences in immune systems =/= pony supremacy.
And I don’t think there is anything wrong with Spike continuing to identify as a pony as long as he doesn’t have a elitist attitude about it like he supposedly did before he met Mina.
Considering he said “I’ve always thought of myself as a pony, not a dragon” and “I’m a pony who doesn’t get sick like a pony,” fat lot of good the whole Dragontown thing did for him, huh?