I've given my recent litter their first 2 sets at 6 weeks old, and 9 weeks old. They are 10 weeks old and I am prepared to give the next set at 12 weeks old. In the bible Jack suggested that we also give a 4th round. My question is if this is necessary because I have always done 3 sets starting at week 8, following at 11, and final ones at 14 week.
I am a believer of less is better in general unless necessary.
What do you guys think? and what is your viewpoints on the coronavirus vaccine?