Dog Rocks Â® are a 100% natural, paramagnetic igneous rock mined from a quarry in Australia. They contain no chemicals and have been scientifically tested and proven safe for all pets.
In brief: Water. Free fluid is typically water. The lining of your abdominal contents are slippery (your bowel, the lining of your organs) and it's thus wet inside your abdomen. It's normal to have a little free fluid in one's pelvis, as that's where fluid tends to pool.
urine formation begins with this process. The filtrate is essentially but not totally protein free. Loss of substantial quantities of protein free fluid from the blood results in the colloid osmotic pressure increases such that blood leaving the glomerular capillaries has a higher than normal colloid osmotic pressure.