I've read some fanciers give preventative medications at this time of year to thier ybs. I've also read some of the Champions do not medicate untill a illness is present. They have the philosophy "if it aint broke don't fix it".
Myself I use prebiotics Apple Cider Vinegar, Garlic Juice, Lemon...
My birdie Basil is going to a new home! :D this bird had suspected PMV and the new home vaccinates their birds. So I am wondering if you can vaccinate for PMV if the bird may have had PMV?
And i'll be bird free just in time for summer! We'll see how long that lasts!! ;)