I'm not sure whether green beans every once and awhile would harm them but cats are obligate carnivores. They must eat meat. They need a high amount of protein and a low amount of carbs.
I,ve been mixing generous pinch of shredded string beans from a can with wet food and kibble. My twin boys, Moses and Aaron have been eating this combo for a few months. Anything wrong with this?
I would probably cut back on the fish because of the mercury but other than that, it sounds like their regular diet is pretty good. The occasional treat is OK even if it's not meat. Melon is high in sugar so I'd try to keep it to a minimum. You'd also need to keep an eye out for any seeds which can cause an obstruction.
My cats, 3 yr twins moses and aaron have been raised with a large variety of wet food mixed with highgrade kibble fed 3x day, including many fish items. They least care about chicken, liver and beef items. However, Moses will attack a cantelope or honeydue or watermelon if left out. Should I force meat items on them?