With freer international relations and debate and given the scope for mutual help and harm, some moral principles may be extended to be applied globally between tribes, nations, races and religions etc. But animals are less close to us. The sympathy has a different quality. Few are infirm. Out on the plains of the Serengeti - life in the wild is tough.
Animals ilive the food chain and struggle to survive.
Most flourish in their own way. We transfer human regard for empathy to the hamster, wasp or rattlesnake. Mostly we pull back from interfering which indeed may do more harm than good. Suffering caused indirectly through pollution has become a cause for concern. Factory farming practices are criticised for the harsh conditions animals are forced into.