Hi Recently found a stray German shepherd and what I think and what other said she's about a year and a half year old. I got her registered and everything shes about 45 iunno if that's considered underweight. She a sweet dog ! ever since i took her in she's like in love with me haha . I would like to ask for help on what I should know about German shepherds . such as what I shouldn't do and do . how are they like? are they protective of their owner? any kind of information would be amazing ! thank you !