Also note the conspicuous absence in who Anthropic chose to invite:
Moral standing refers to the condition of being morally considerable, where an entity is recognized as one towards which moral agents have obligations. It implies that such entities should have their needs, interests, or well-being taken into account in moral deliberations.
I thought people believed that animal welfare is important. And Claude's welfare is important too. We shouldn't be using it for profit, it's not smart enough to express meaningful consent.