How old can the manure be and how long can it be stored?
We like to have the samples as fresh as possible. We recommend collecting the sample from the freshest pile in the stall in the morning and drop it in the mail that same day. The eggs need oxygen to develop and hatch so if the exposure to oxygen is limited the sample can be good for several days. When stored in a refrigerator samples may be good for several days. We have samples that arrive 10 days after being collected that have 1000-2000 eggs if packed in our sample containers properly. Many people will tell you that samples cannot be shipped but we have found that it works well.