Interesting that this topic would be near the top, on my first day here. (It must be from Jehovah!!!) (JK!) Even when I was at my peak of compliance, I knew that this couldn't possibly be true. I'm not the only JW in my circle who noticed it, but unless everyone was hiding better than I was, no one seemed to think it was as serious of a problem as I did. Everyone just reasoned that either 1) Jehovah would help to resolve all difficulties in understanding, or 2) science is missing the necessary information to accurately convey Biblical truths.
What is most interesting is the peculiar pattern that comes up when WT teachings don't conform to established facts. No one I've ever discussed this with ever spoke of how the WT would be proven wrong, rather, they spoke of how the Bible would be vindicated. As if WT interpretation of the Bible, and what the Bible itself actually says, are somehow one-and-the-same. Until, of course, the GB changes their mind on what the Bible says.
In any case, despite very little emphasis on discussing the topic in JW publications and meetings, the plight of animals in God's purpose is one of the most persistently troubling when it comes to juggling the doublethink (triplethink?) required to believe in Bible AND the WT AND scientific discovery. From the questions of pre-Edenic/antidiluvian diet, original sin, God's supposed allowance but non-cause of suffering, the value of life, the symbolic question of blood, the mercy of God on the innocent, the temperament of animals in the new world, the fate of the animals both on and off the arc, and the abundant evidence of evolution, there is a surprising amount of starting and ending points to this topic.
What's more, you can typically, as an unbelieving but faking-it JW, tactfully bring these subjects up, with otherJ Ws without them having a knee-jerk GET BEHIND ME SATAN reaction (with the exception of evolution, of course). It amounts to a simple curiosity and some handwaving, but who knows, maybe it opens up the quiet floodgates of the ever-freed mind.