I bought 2 of these, and then a day or so later they had a sale where you buy 2 get 1 free. I reached out to customer service and the sent me the third one as well! I was so happy! Anyways I tested one of my girls at 25 days and not sure what I was seeing…could have just been where the test strip should have been, so I tested her again at day 30, and even though it was faint, we got a positive test. This girl for some reason always gives me a faint positive even though she always has about 6 puppies. I have another girl now to test on Wednesday and can’t wait to see her results! Thanks again for such an awesome test and such great customer service!!