Has anybody used this?  Any opinions?

Hello

I use a combination of AG Performance and Prestige for our Aussie as she doesn't eat much and loses weight easily (we do a lot of cross-country running together). It suits her in that it keeps weight on and she eats it (she's a little picky sometimes). We also mix it with NatureMenu for when we want her to eat just a bit more ... like when we were on holidays in North Wales and out walking for 7-8 hours :-).