Have you ever heard the saying.. "its bad to feed birds rice"?? This pertains feeding your Ps dog food also. Dried dog food expands after sitting in water for awhile. If broken pieces of dried dog food were to be over eatten by Ps, imagine how much it can injure your Ps when it expends inside its stomach. Even canned foods aren't recommended, due to the extra ingredients mixed.
I've fed Trout Chow to my one rhom, It eats it with no problems as part of a varied diet that included earthworms, crayfish and feeders.
I still use pretty much the same diet with the addition of beef heart .
The dog food thing,
Reminds me of the time my friends daughter dropped a few handfulls of
Purina Dog Chow in my 120 gallon.I'm sure the oscars got some of it but I couldn't tell by their behavior.