We have may stands of cold-hardy bamboo growing about this area of MD and Virginia, I'm guessing these large natural grasses aka bamboo are good? I'll take some pix when the deep freeze is over!
Is that 'lucky bamboo'? If it is, it isn't actually bamboo but is a dracaenea and is usually listed as toxic.
Actual bamboo is often listed as safe, I've had tortoises eat small amounts and were fine. however here's a thread that raises an interesting point that I haven't had time to delve into further:
Sorry I haven't been on in a while! I don't know what it actually is but I trust you know what your talking about! I actually did give Wally some when I saw @Maro2Bear but he wouldn't touch it-- thank goodness!