ear problem

My boar of nearly three years, Storm, has recently developed a small, white bump on his ear. It's only on the backside near the edge, and is clearly raised. The skin above feels 'strained', similar to human pimples, but there seems to be no inflamation, reddening or anything similar. The bump...

This is Mabel, she is 4 months old and lives with her sister, Hoggy. Today I noticed this bald spot below her ear with a spot of dried blood. It's a very rough texture and has a silvery sheen as opposed to the rest of her pinkish skin. I haven't seen her itching, and when I press and touch...