private void buttonAddAnimal_Click(object sender, System.EventArgs e)
 {
     Animals.AddAnimal(sqlConnection, dataGridViewZOO, textBoxAnimalSpecies.Text, textBoxAnimalAmount.Text);
 }
 private void buttonShowAnimals_Click(object sender, System.EventArgs e)
 {
     Animals.ShowAnimals(sqlConnection, dataGridViewZOO);
 }