I rescued Butter as a Goldendoodle, but he turned out to be more like a lab with much short fur. I am not sure if he is hyper or not, but he is the most friendly dog I have ever seen. When a visitor comes, he is very happy for the first 5 minutes or so, if not controlled, he may jump onto the visitor if they are too happy or too scared. Otherwise, he'd just sniff and lean on the person. But after 5 minutes, he usually calms down and lies down at the feet of the visitor. An incident happened today: a client came through the back door by himself(my wife is a acupuncturist), Mr. Butter rushed down to meet the guy, and jumped onto the guy several times, he fell down by himself to avoid Butter. I am not sure if Butter was too excited or not happy about the intruder...