The first step for organizations toward reputable animal welfare practices is establishing an intended way of handling the animals that are part of their business acitivities. Ideally such a policy includes a systems that enables the organization to monitor and control these processes.
Using search terms like "animal welfare" or "animal wellbeing" go through the company's CSR report and establish whether a policy has been put into place that addresses animal welfare practices.
Specify in a comment to the metric value whether this policy is applicable to internal and/or external (for instance in their supply chain) activities.