collecting pee from a dog is much harder than you would imagine 09/20/2006 by beerorkid Leave a Comment I got about 1/2 an ounce after 4 tries. This vid would be the first attempt. Apparently stopping the pee flow is not painfull for dogs 😉 Click pic or here for best version good thing is the vet said it will prob be enough. same vid, below youtube. please digg this if you will.