I have a 6 month old goldendoodle puppy that I brought home last week. She had diarrhea yesterday so I gave her 250mg of Metronidazole in the morning and at night. The breeder had sent me home with some just incase she had an upset stomach. Anyways now she hasn't pooped since yesterday at 10:00am. Should I take her to the vet? She is passing a little bit of gas as well.