I think it's ridiculous advice. Sounds to me like profit hoarding for boarding! LOL
The only advice that should be given is that with two dogs, the neutered one needs to be calm for a few days, no rough play, no jumping, that sort of thing. But to seperate them? SILLY!!!!
LISA ~ Lily LaRue - 4/07 boxer; Buster McDoogle - adptd 6/07 Vizsla/Besenji mix; Annabella Kanicki - 5/08-7/09 staffy; Mr. Smiley - 4/10 Boxer/pibble mix; Fozzy Bear - 5/10 Red Heeler/pibble mix