Giant Pandas (Ailuropoda melanoleuca) don't eat every kind of bamboo. Whilst there may be about 12 species of bamboo growing in a panda's territory, it may only eat two of these, before heading off to find somewhere else to feed. As the old saying goes, "He eats, shoots and leaves."
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BTW, my plan is to do all the animals from the original ZT2, then all the animals from ES, then AA, then MM, before saving the downloadable animals for last, to give the (wonderfully clever) staff of BF to bring us more surprises. Look out for another project I may also do.
P.S. If you're wondering, all the animals from the pictures taken so far are from the same zoo. I really did build a zoo with all 30 original animals in it. Then I repeated it for ES and AA. MM2 will follow suit.