Hypans like Chocolate Zebras are omnivores and thus can eat and digest meat matter better than most other 'plecos'. Shrimp tablets and good quality bottom-feeder tablets are a must; shrimp, fish and other such foods can be given along with veges like courgettes and cucumber, peas, carrots, potato etc.
I feed all bottom feeders raw prawn, not cooked.
As for feeding all plecos the same food - bear in mind that the family Loricariidae may refer to hundreds and thousands of different fish and all their diets vary so we may need to know what the pleco is to answer that question Skip.
Ancistrus species are primarily vegos, and eat a little meat protein.
From PC-