private void BTN_clients_ajouter2_Click(object sender, EventArgs e)
        {
            EcranAnimaux monEcran;

            monEcran = new EcranAnimaux();
            monEcran.Show();
        }
        private void BTN_AddAnimal_Click(object sender, EventArgs e)
        {
            EcranAnimaux monEcran;

            monEcran = new EcranAnimaux();
            monEcran.Show();
        }
        private void BTN_clients_editer_Click(object sender, EventArgs e)
        {
            EcranAnimaux monEcran;

            monEcran = new EcranAnimaux((Guid?)dataGrid_clients.CurrentRow.Cells["CodeAnimal"].Value);
            monEcran.Show();
        }