Feed. The rewards seems to be worth it, you can get candies of the pokemon you feed, you get some stardust and you level up the gym badge so that it gives you more rewards for spinning the disc.
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ohh nice, that is what leveling the badge does... so how many levels can u make it?
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three tiers like medals (bronze, silver and gold), i don't know what the rewards are yet but i'm quite sure it gives you more items when you spin and possibly more raid rewards (both in premier ball for raid boss and stuff like golden berries, rare candies and TMs)
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Anyone know the odds of getting candy? I have fed as many Blisseys, Lapras, Snorlax as I have seen and never a candy...