Animals are better protected than humans, in transit in so many countries.
When DVT first started to get a lot of publicity a few years ago, the airlines seemed to hold their breath and issued bits of advice about “hydration” and “moving around”. This sounded like they were only trying to cover themselves legally.
Now they seem to have relaxed and thought they got away with it. I too can’t wait for the first multinational mega-suit that the family of a passenger wins due to inhumane overcrowding and lack of space particularly on long haul.