Just like human teenagers, adolescent dogs will want to have it their way and will want more independence. (dogtrainingbasics.com)
Researchers at healthcare firm Alkahest in San Carlos, California, recently injected blood from human teenagers into old mice, and found it made them more active and improved their memories. (newscientist.com)
No wonder: by the age of 12 months, he will have attained the physical growth of a 15 - year - old human teenager, and he will undoubtedly start showing some of the same personality attributes of that age. (thesprucepets.com)