#ifndef DOGS_H
#define DOGS_H

#include <string>


class Animal
{
public:

	// Public methods
	string GetName() const;
	void   SetName(const string& strNewName);

	... Other methods common to Animals ...

private:

	// We assume that all Animals have a name
	string strName;

	... Other attributes common to Animals ...
};


class Dog : public Animal
{
public:

   // Public methods
	void Bark();

	... Other methods and attributes common to Dogs ...
};


class Collie : public Dog
{
	... Methods and attributes specific to Collies ...
};


class Terrier : public Dog
{
	... Methods and attributes specific to Terriers ...
};


#endif