We use "cores" at work for winding PVC onto & as i've just got a load of samples in of HDPE plastic ones (is this a safe plastic for guineas? it's damn solid) to replace the thick card ones we use currently. Occurs to me they might be fun for guineas but thought i'd see if there was any advice on smallest, biggest or otherwise size or construction recommendations before i try & take some home for any piggies i may get.
As i'm waffling hopefully a picture will paint a better er picture, although maybe not with my shakey hand camera phone attempt, so these any good?:
Ta
Si
As i'm waffling hopefully a picture will paint a better er picture, although maybe not with my shakey hand camera phone attempt, so these any good?:

Ta
Si