I had a small pup i rescued from the street. i kept her for 3 days until I realised that it had epilepsy. She would fit a lot, so we took her to the vet. We were advised to take a vaccine as a preventive measure. The vaccines were for 0, 7, and 21or28 days. But i was told that 0, 3, and 7 would be fine. So i tool for 0, and 3. I missed the 7th day... Can i take the injection on the 28 th day now?