
Do you mean Platinum as in Germanys platinum? (The have been at most champ shows over the last year, Crufts 2014 was their first).
http://www.germanysplatinum.com/They have only just moved into the UK market so not sure if its the same one your petshop owner was talking about Tinar? (they only have few flavours, puppy and adult, and they are all soft).
I did loads of research into them after trying my puppy on their puppy kibble before changing to raw and really really rated them. The only thing that stopped me from moving to them completely is I didn't have a clue where to get the food from (at the time it was only online and that wasnt registered for UK purchases yet)!
All about dog food rates them to (I actually requested them to review it in my research as there was so little information about them!).
I think if you have tried some samples and your dog gets on well with it, give it a go, its digestibility is different to hard dry kibbles. I always have a 1.5kg bag around for treats as they make great training aids too :)