I would expect the urine output to tail off for a few hours due to the stress on the kidneys and the time it takes for the body to respond to the fluid.
Urine shouldn't be grey; it should be clear to yellow, depending. If your urine is the wrong color, or has a strong odor, you should consult your doctor.
Rat urine looks like what anyone would expect urine to look like. It is a liquid, that can range in color or smell. The colors and smells are dependent on the rats diet.
the patients normal urine amount, because all you're doing is replacing fluid lost.
A puppies urine should be yellow on a puppy pad.
Normal urine typically contains water, urea, creatinine, sodium, potassium, chloride, uric acid, and other waste products. It should be clear or pale yellow in color, with a slightly acidic pH.
If your urine contains blood you should visit a doctor.
You should be aiming for a urine output above 1 ml/kg/hr
Is it bright yellow
Probably not. Urine is sterile unless there is an infection. The surgeon would likely suction the area, and pack it with gauze until it was time to close.
One needs to pass urine after surgery to ensure the kidneys are functioning properly. Failure to pass urine indicates a renal problem.
No, the color of urine determines your hydration. The only way you can find out if it has drugs in the urine is through a urinary analysis, or a drug test. The urine color does not change for drugs.