I personally wouldn't feed offal to Alfie every day (he's on a raw diet). He only gets offal once or twice a week. The other thing I would consider if you want to feed him like this is that he may well stop eating his dry food altogether if he thinks there's something else coming his way later on. It's not recommended to mix raw and complete food in the same meal, especially if your dog has a tendency to a dodgy stomach. I do it sometimes with Tilly but she has the constitution of an ox. She is on Autarky dry food with added NatureDiet, tripe, sardines&egg or sometimes mince. It all gets mixed up in the same bowl though so she has to eat the dry food as well.