I think the officials overreacted, I understand that rabies is a nasty fatal disease. But the euthanasia is completely unnecessary. The officials say it's to determine that the animals don't have rabies after peanut bit one of them. If the animals turned out negative for rabies then it means no danger, if positive the only thing they can do is vaccinate the worker, there's nothing else they can do but wait. Why not just vaccinate the worker and let the animals live?
Also sheltered animals are in no danger of having rabies unless they are bitten by a rabid animal outside.
He had just taken in a raccoon so the squirrel could have gotten it from that, and they don't know if the owner had been lying about taking it outside.
This is all the owner's fault for not taking the squirrel to a proper animal sanctuary.
If a animal is tested positive the human have to undergo about 2-4 vaccinations that might need to be repeated and will cost a great amount, or they die. The vaccination has a lot of side effects.