
I feed mine on it and they do really well. In fact I switched my pup from JW to Harrington's puppy as he was quite loose on JW and he firmed up very quickly. They all love it and for the price I think it is good......even better now that Asda does a 15kg bag of the lamb and rice, the one they prefer.
I did write to them whilst feeding the pup on the puppy food as it does only come in 2kg bags which when feeding a young Flattie lasts no time and it is in the pipeline to produce a bigger bag of puppy food at some point.
I still add 'extras' such as sardines and raw eggs a few times a week but overall I really think they do well on it.