Woah your dog!? Im guna be straight up with you, thats seriously DANGEROUS to your cham...although what looks like innocent playing, licking etc. I can assure you your cham is getting stressed from this... the reason he is trying to climb your dog is most likely cuz he is scared for his life! I personally NEVER put my cham in sight of possible predators, cats, dogs, other chams will raise his stress levels, and this is what we as keepers try to prevent!try to look at it from your chamelons perspective and please be proactive with your ineteractitions with your cham ?