[Bonnie's Mom]

Ok...I have finally run out of the 60 pounds of Chicken Soup that I bought last fall and I am thinking about changing brands. In addition to Bonnie we also have a 60 lb 13 yr old mixed breed (see picture below). No matter how hard I try to keep their food separated, they insist on eating from the others bowl so I have just given up and am going to feed them the same. They liked the chicken soup at first, but the last month or so, they have not seemed to go for it as much. Before that I was feeding them food from the Grocery store, but have learned from this site that isn't the best thing for them.
Keep in mind that Bonnie could probably stand to lose 2+ pounds (she weighs 8 lbs and has gained more than 2 lbs in the past year). Patch just lost 14 lbs due to sickness (he is fine now) and is doing much better on his 13 yr old knees, so I don't want him to gain any weight back. In the picture below, Patch has just had his summer cut, he normally has longer hair and it is coarse.
I know I have seen threads on here before about different foods, and there was 1 that I was interested in, but I can't for the life of me remember the name, or I would have done a search for it. I would appreciate any input that you may have regarding which food you think would be best for Patch & Bonnie! Thanks in advance for your help!