A young lady came by this morning and ask if I would take 2 seven year old RES that belonged to her husband (he passed away in Oct from cancer). They lived in a 55 gal aquarium so I figured they were males. I don't need any more males(really don't need females either) but I said yes anyway. She and her daughter brought them by at about 5 pm, It was a pair, I thought kind of small for the age.I put them in a old roach bin without water, hoping they would poop so I could get a look at it,boy was I surprised when I checked on them a little later, BLUE POOP. the poor things have been eating gravel.nothing else passed but a terrible stink. I rinsed them off but left the gravel in to take a pic. I believe they will be fine in no time, RES are tough turtles. Len