If you are worried about finding a good container, you can always get one at your veterinary office. Drop by before your appointment and ask for a fecal container to use when collecting your sample. Most veterinary offices will always have some on hand. [2] X Research source
This process will end up with the poop in the bag and your hand clean. Try to avoid including debris from the area in your sample. Avoid getting a lot of grass or rocks in the sample container but a few pieces will not damage the sample.
Any tests done on the stool will use a minimal amount. With this in mind, usually about a gram of stool is enough.
This does not mean that you need to chase your dog around your yard and collect its feces before it hits the ground. It just means that you need to be sure that you can identify its specific feces by seeing where your dog goes to the bathroom.
Wait until a time close to your appointment to collect the sample, but be sure not to wait so long that your dog doesn’t have a bowel movement when you need it to.
Make sure that the sample you bring in was collected within 12 hours of the appointment. Be sure to place the sample in the container inside of another container, such as a plastic bag, and keep it well away from the food in your fridge. You may also want to put a note on it to warn any other household members about what is in the container. Only place the sample in the fridge as a last resort in hot weather if you have nowhere else to keep it cool.