Append string to int in datagridview column?

Question

I want to add a string after the age declaration. Depending if it is a dog or a puppy I want to add either "year" or "month" after. Is this possible?

 

string name;
int age;

Animal cat = new Cat();

cat.Name = name;
cat.Age = age + "months";  // This I want to add a string after the int value
Petowner.Pets.Add(cat);

 

Excuse me for my drawing skills :)