Is Bell's actually using two different yeasts for each of those ales? You may actually be making two starters of the exact same yeast. No biggie though. That just crossed my mind.
Are you planning on stepping up your starters? How big are they right now? If you're not planning on bringing them up in volume, you really don't have to "feed" them at all now. They'll be eating away on the wort in the starter. I always add yeast nutrient into my starter for maximum performance, so if you haven't added that yet, you still could do that to feed them some more.
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"Brewers enjoy working to make beer as much as drinking beer instead of working."
-Harold Rudolph
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