Someone explained it to me as when an American says "sorry" they mean "I'm sorry I did a bad thing to you" and when a Brit says sorry they mean "I'm sorry a bad thing happened to you". Which also explains the not uncommon American response to "sorry" of "Why? It wasn't your fault".
If something that's out of my control happens to someone I might say sorry and mean "I'm sorry a bad thing happened to you".
I'm British and find that sometimes I think similarly to another person who is British, and at other times I think differently to another person who is British. It's wild.
Pets are treated as simple property by US law and the liability is strictly limited to the cost of replacement. There has never been a civil judgement in the US beyond that. There are CRIMINAL issues involving treatment of animals, but none of those are applicable here.
This is pure incompetence by WAG's legal and customer-service departments.