dumbo or top eared rats

Question
i am thinking of getting 2 male rats that are not from the same litter. one is a dumbo which i have named Dumbo and the other is a top eared rat i have named Ronald. will they be aggressive towards each other or not? i also have a question about the size of my rats. are they going to be more aggressive because of the slight size and age difference or not?

Answer
The placement of their ears has absolutely no bearing on their temperament. However, its best to introduce them while young. Size also makes no difference in how they will act, either. I once had a female that was no more than 200 grams and she was as feisty as can be, the bully in the bunch, the alpha female rat over even the largest females weighing 600 grams!