Silverwing To Mrs.Frisby and the rats of Nimh

I am going to compare Silverwing to the book I read. Well rats and bats are a little different but the problem is a little the same. The yougest mouse, who is very weak get's sick and in Silverwing Shade the weakest bat get's lost. Both about the weakest in the coloney. It is also both about animal's. That the comparison from Silverwing to Mrs.Frisby and the rats of nimh