Between 2007-2013, the proposed Universal Declaration on Animal Welfare (UDAW) sought official adoption by the UN. As of this writing, it appears that this mission may have dissolved and individual NGOs have instead adopted the UDAW framework into their own policies.
The World Animal Protection created the Animal Protection Index (API) as a tool to understand how 50 countries are performing with animal welfare legislation and animal protection standards. This tool allows interested parties to assess individual countries from a comparative perspective but the API was also designed to hold countries accountable. A precursory glance at the data for the year 2020 makes it clear that every country has significant work to do. The fact that no country received an overall A score makes this all the more evident.

The following table offers a summarized glance at how four major
countries compare. Each of these countries received unique scores on
the API. These countries – UK (B), India (C), USA (D), China (E) –
were selected for their similar industrialized economies and
presence on the world stage.

As the table illustrates, while the UK scored an overall higher score, their performance is inconsistent. Recreation animal legislation and farm animal legislation are on par with the other compared countries. Recreation and farm animal protection are the weakest areas across the board.
On the one hand, this comparative perspective can help highlight
individual country performance. On the other, it makes clear that
animal protection is undeniably an international challenge that will
require collective efforts. Between 2007-2013, the proposed
Universal Declaration on Animal Welfare (UDAW) sought official
adoption by the UN. As of this writing, it appears that this mission
may have dissolved and individual NGOs have instead adopted the UDAW
framework into their own policies. For example, the International
Fund for Animal Welfare (IFAW) and World Animal Protection have
incorporated the fundamentals of UDAW into their organizational
efforts.
Back in 2013, Marc Bekoff, Ph.D also made the case for a
Universal
Declaration on Animal Sentience, a distinct nod to the UDAW. A quick
glance back to the API table above reminds us that the average score
for formal acknowledgement of animal sentience in the year 2020
across the four sampled countries is a D. The average score for this
metric across all 50 countries that were evaluated by the API is
also a D. Colombia was the only country awarded an A score for
inclusion of animal sentience in legislation.
In Dr. Bekoff’s words, “We need to stop pretending we don't know if
other animals are sentient. We also need to accept that we know what
they want and need. Their minds aren't as private as some claim them
to be. Surely, we might miss out on some of the nitty-gritty details
but it is safe to say that other animals want to live in peace and
safety and absent fear, pain, and suffering, just as we do.”