> It could just of been coincidence that my boy perked up
Yes, it could. Or, you anticipating him being more alert rubbed off on him. Which you detected, and this made you more enthusiastic, which made him happy and sparkly, and so on, and so on....
I train ringcraft and I show both my own dogs and sometimes train and show dogs for other people. In my experience, never underestimate the effect you have on your dog. It's so subtle signals you both send out, and you are both so quick to pick them up. Even if you
know that your behaviour and mood will affect your dog, and you are really acting happy and playfull, your dog will sense it, if you suspect he might not perform. And then he probably won't. Because the "wheel" is turning the wrong way. The effect this remedy has, might be that it turns the "wheel" around, and it's starts turning the positive way?