【英语时差8,16】狗比猫弱？（下）

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Now, even small dogs are genetically¹ programmed to function like predators², which makes sense considering they are close relatives of wolves. And birds–you can probably figure out why the only way you’d find out your bird is sick is when it dies. The situation with cats, as compared to dogs and birds, is much more interesting. On the one hand, cats are predators, but on the other, they’re small enough to be prey³. So how can you tell if your smaller pets need medical attention? For one thing, trust your hunches⁴. No one knows your pets like you do, so if you notice even very subtle changes in habits and behavior, you may want to have a vet⁵ look them over. For a cat, other signs of illness might be that it has stopped grooming⁶, is losing weight, vocalizing more or less than usual, or missing the litter box.

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