Fat and healthy?

I am new to seahorses, I bought a Orange Kuda from a member here a few months back and I want to make sure he is fat and happy. Since I have had him he has turned from brown to a bright orange color but he only seems to want to eat every other day and I have read that you should feed them a few times a day. I do not want to overload my system with feedings that are going to waste so I just wanted to know if anyone knew what to look for on a seahorse to make sure he is not skinny. He seems happy enough always playing in the current and when he does eat, he eats a ton. Thanks in advance for any advice you may have!
 
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