Waggies worst dog food. Makes dogs sick and loose weight

In 2023 I bought Waggies every now and then and my dogs were fine with it. BUT now in September 2024 I bought a few 8kgs bags for my Canine family. My one dog lost so much weight in a period on 3 weeks. He became skin and bone. He coughs and brings up. I put hom on a different diet and he is recovering. I gave the left over bags to my son. Now he tells me his dog became ill as well. Also coughing and bringing up. I now know Waggies casued this. My other dogs did ok on it so I did not want to pin point it to the dog food as they had it before. But when my sons dog also became ill I realised it is Waggies. Very disappointed