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NSMutableArray accessing
This is my problem, I have some object called "animal", and inside that object I have a NSMutableArray of "String" objects called "animals".  I have a method that prints out the animals object, and I call it in a for loop.  My issue is that when I call [animals objectAtIndex:0] it returns me a null.  Here is my object:
@interface Animal : NSObject {
    NSMutableArray *animals;
}
@property (nonatomic, retain) NSMutableArray *animals;
- (void) printAnimals;
@end
@implementation Animal
@synthesize animals;
- (void) printAnimals {
    for (NSString *string in animals) {
        NSLog(@"%@", string);
    }
}
- (void) dealloc {
    [animals release];
    [super dealloc];
}
@end
And then I instantiate it and store it in an array of Animals
NSMutableArray *animals = [[[NSMutableArray alloc] init] autorelease];
Animal *a = [[Animal alloc] init];
[animals addObject:a];
Then I call the method to print it
[a printAnimals];
I am not sure what I am doing wrong here?
A:
AFAIK, -objectAtIndex: calls [array objectForIndex:index] (or something similar).  It will return null if the array does not contain an object at the index.
You have created an array of Animals (you are setting its class to Animal), but there are no Animals in your array (there is only an NSMutableArray).  I would think you need to create a single animal:
Animal *a = [[Animal alloc] init];
[animals add
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