RE: Code Blue Standing Estrous
the thing about any urine is frshness. i have used code blue but if you have noticed that when you buy it is urine colored, but once you open it it turns brown. this the the result of the urine hitting oxygen and breaking down and becoming stale. when this happens it is no longer going to be an affective tool. they vacum seal their product that is why it stays that nice color till you open it. pick up a bottle of tinks and look at it. it is brown from the the time you open it. that tells you that it has already gone bad. shelf life will kill it as well. urine in general doesnt last long once it hits oxygen.