Can I use puppy chow to put weight on my 11 yr old dog?

I have an 11 yr old dog. I would like to see her with a little more weight on. She is health, just getting up there in the years. Can I use puppy chow to add a little weight on her, and then just use it to maintain her weight. Ive been feeding her dog food for older dogs but she is losing to much weight on it. ... show more I have an 11 yr old dog. I would like to see her with a little more weight on. She is health, just getting up there in the years. Can I use puppy chow to add a little weight on her, and then just use it to maintain her weight. Ive been feeding her dog food for older dogs but she is losing to much weight on it. She is very active for an 11 yr old. Thanks, Kari
Update: She's a German Shepherd, Boxer mix.
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