[header] How to collect a urine sample from a female dog [title] Choose your container. [step] The ideal container is wide, flat and shallow, such as a baking tray, takeaway food container, or foil pie dish. It needs to be shallow enough to slide under a small dog, and yet wide enough to catch the urine if your aim is a bit off target. 
[title] Understand why sterilizing the container is important. [step] If the vet wants to check the urine for the presence of infection, he or she may want to culture the sample.