u/yourmomisemo

i have recently discovered that it looks like one of my rats (the dark one) has two tiny bald spots. i've been googling all day and google said it could be mites or just from grooming and playing. but also when i got my boys, the light one had scabbing on his ears (as u can see in the picture). this isn't normal right?? i've been watching them for excessive scratching but idk what normal rat behaviour is and what scratching a lot is. i think they might be scratching more than normal but idrk?? i also have one other boy that is not in the picture and he acts and looks completely normal. (lol just saw his big belly is t the top of the pic) should i go to the vet asap or???