Target Corp., Whole Foods Market and Walmart Inc. will be added as defendants in lawsuits against baby formula maker ByHeart for selling a product potentially contaminated with spores that cause infant botulism.Bill Marler, a prominent foodborne-illness attorney who is suing ByHeart on behalf of families whose babies were hospitalized with botulism, said Sunday he plans to add the grocery store chains to the lawsuits this week. “ByHeart likely is insolvent and will likely go bankrupt – sooner or later,” Mar ...