I don't think steroids are a good choice. We've recently been talking about different pain medicine, and the next step up from Metacam is a narcotic like Tramadol or Buprenorphine. Steroids are contra-indicated in situations where there's an infection, because they knock down the immune system, which is needed to fight the infection. In fact, some people think steroids aren't good for rabbits at all, because they have so many pathogens that exist in them normally at sub-infection levels, (including pasturella, one of the common ear infection bacteria). The rabbit's immune system usually keeps them in check so decreasing its ability to do so isn't a good idea, especially if there's already an infection going on. A narcotic pain med may help, and I really think the meclizine will help as well. Poor little guy. I know this is difficult to get through. Can you give him his fluids while he's lying down like that? As long as he stays still and you get them in the subcutaneous space, it should be good.