Why did Grandfather want Timothy to be put in another enclosure?

Grandfather wanted Timothy to be put in another enclosure because the one he was in was an overcrowded and noisy environment that was not conducive to his health and well-being, and Grandfather believed Timothy deserved a better home. Grandfather likely felt that Timothy should not have to live with the constant disruption and stress of such a loud environment, and he wanted Timothy to have a chance to be in a quieter and more peaceful environment.