The trouble with one day old is that the stats from studies suggest I would lose half of them to Marek’s in the first 2 months.
Same as if they were not vaccinated.
If I wait 10 days then 90% will survive.
Small breeds at 6 days maybe? Or take a risk on 5 days. Hard to know what to do.
Can you keep Tassels inside your garage away from any possible contaminant that may be Mareks heavy (dirt), and let the vaccine do its magic?