None of those count as clones.Red Fox : Different in colors and biomes (spans to every biomes), Nice addition to the arctic fox
Alpine marmot (could be american or siberian species): Slightly bigger and more fluffy and more Taiga and tundra biomes. This clone of the Praire dog could be easy filler and the alpine part of the zoo
Chamois (Alpine, Pyreenean, Caucasian, Vosgian and so on) can easily have nice fur variation depending on the species choice and different horns than Dall sheep or Alpine ibex.
A clone animal is one that is morphologically nearly identical to an existing animal in the game. In terms of what you've listed, all three would require substantial edits from the original source model (Arctic fox, prairie dog, ibex).