Vizslas are one of the breeds known for sebaceous adenitis. I'm not saying that's the cause for your dog's hair loss. Just you just may want to discuss it with your veterinarian.
Not all those who wander are lost.
Life is just a leap of faith.
Spread your arms and hold your breath and always trust your cape.
Two things define you. Your patience when you have nothing, and your attitude when you have everything.