https://www.vetnurse.co.uk/f/clinical-discussions/12129/dumbbell-shaped-urine-crystals Has anyone seen them before? An ex colleague has seen some in guinea urine and wants to know what sort of crystals they are. I&#39;ve googled and they seem to be calcium oxalate, which i guess would make sense if it&#39;s a pig being fed calcium rich veg. en-USTelligent Community 10https://www.vetnurse.co.uk/thread/106517?ContentTypeID=1Fri, 21 Jan 2011 21:07:41 GMT1a0763ec-3885-442c-853e-6cef656dfec5:d1bb8175-c1e9-4d9a-981e-fb39665811deVicky RVN<p>Ah cool thanks x</p><div style="clear:both;"></div>https://www.vetnurse.co.uk/thread/106516?ContentTypeID=1Fri, 21 Jan 2011 21:06:37 GMT1a0763ec-3885-442c-853e-6cef656dfec5:03997343-85f2-446e-b0ed-b52cf50739cbMaisy<p>Calcium carbonate are common in guineas and can be dumbell shaped..</p><div style="clear:both;"></div>