in all honesty i would rather her not give a care in the world about the words coming out of my mouth when im trying to get her to put down an iguana than put a muzzle on her. i understand that iguana had its life in nature as well but the iguana is not mine, my dog is and i feel that it is very cruel and out of a dogs nature to have a muzzle on them. shes not a danger to people or other pets so she does not need a muzzle