[Zope] Python Class Question

[Daniel G. Rusch]

Let's say I have a class called Chicken in a file called Chicken.py

Now let's say I want to add a method called getSize() to the Chicken
class. It's a piece of cake to add the method in the Chicken.py file. 

But, is it possible to add the method to the Chicken class, but have
that method in a different file, i.e. some file other than Chicken.py?

Thanks,
Dan