At 6-8 weeks of age puppies should receive their first vaccination; this is temporary and needs to be followed up with another one at 12 weeks. After the 12 week vaccination you can then take your puppy out in public areas.
You can be contagious from a few days up to two weeks or more, depending on which virus is causing your stomach flu (gastroenteritis).
After approximately 1 to 2 days, depending on the virus, stomach flu symptoms can appear. This period between the stomach flu transmission and the start of symptoms is the stomach flu incubation period.. In some cases, the stomach flu incubation period can be as short as 4 hours.here are a variety of viruses that cause the stomach â¦ flu (viral gastroenteritis). The incubation period for most of these viruses is 24-48 hours. However, the incubation period can occasionally be a full week.