Can anyone advise the best way to prepare chicken liver for my 13 wk old pup. I've read that dogs love liver and i need a high value treat to do lead and recal training as her regular 'wagg' treats just aren't holding her attention. Can i dehydrate them using the oven? And how much should be given? Im feeding her above the daily amounts of regular food but a few people have commented that she looks skinny but shes just a live wire!