Pearl is a show type and has been fed Skinners or Chudleys most of her life. Currently on Skinners muesli. She does really well on the food and has a lovely coat - I do weigh every meal and feed her slightly less than the recommended amount to compensate for being less active and the amount of treats she has each day!
On the odd day that she does work I increase the amount to normal portions and carry a piece of fudge just in case
Each dog is different - the protein level may not suit all.... If you call the manufacturers they will offer advice (their food, obviously
) but also a sample. When Pearl started to have real problems with her anal glands, Skinners sent 5Kg of salmon and rice for her to try. It did help but ultimately the glands were removed hence being back on the muesli which she loves!
Dog food is such a confusing topic - good luck!