Pictures are always great! Does he have all of his adult teeth in yet? He could be just finishing the teething process. At 5 months it is time to get serious about the ears, but if they were standing straight before then they will again. Nutrition does play a major part in ear development. First thing is to check for any ear infections. If that's clear you may need to assist with the ears by gluing or taping. Better to be safe then sorry!
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