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Say It With Flowers
People like to have pets, but in a space colony there will be limited food supply, and the significance of recycling everything. That means there won’t be that much left over to get a pet of another species in a space colony. Therefore, what types of pets might you have? Having plants as pets may work, but sometimes that is not enough for humans.
Small rodents and mammals might work, but that also could be problematic, and we do not know how well they will do in space. They might do better compared to humans, and they may replicate well, but then they would eat the colonists out of house and home. Therefore taking dogs and cats to Space may not make any sense – how about ferrets, mice, or other smaller creatures; hard to say.