[anonymous]

Here is a cost effective idea, just add a spoonful of scrambled egg (no milk) to meals, or a bite of lean chopped cooked chicken, mixed in with the kibble and a splash of water.
That gives them a bit more protein and makes the meals more interesting.
I hope you are not free feeding (leaving food down) I have found 2 meals per day measured amounts is best. Walks/exercise as tolerated.
Do you have some specific health concerns?