What’s an animal that you wouldn’t want a facehugger to impregnate?

Situation: You’re in a space station or colony that contains a lot of animals. Some hypothetical situations as to why:

• Some sort of zoo (they’re rich enough to afford it)

• A traveling space circus

• A scientific facility that tests on various animals

From looking through some collected wreckage, a facehugger comes out, and before you can kill it, it immediately crawls into a vent that leads to where the animals are. By the time you enter where they keep the animals, you already see the facehugger laying dead, meaning it’s already done its job. The only thing you can do now for the next few hours is pray to God.