Hi all, I'm new to this website, and I'm in deep need of advice. I have a 4 year old GSD who I love, and adore so much. Recently, due to me getting ready for college, I haven't been giving her the attention she needs. A friend of mine suggested that I get her friend. So after a long time of searching for the perfect puppy. I adopt a chocolate GSD mix. He's 3 months old, and one of the most laid back, sweetest puppy ever. However, after multiple attempts of introducing my new puppy to my 4 year old GSD she tried to attack him, and becomes highly aggressive towards him.
I used to have a male Pomeranian before and she got along with him perfectly fine. So I don't understand why she's being so aggressive towards the new puppy. Is there anything I could do to get her to lighten up to him? I don't want to give this new puppy away. I've grown attached to him, and I just want the both of them to get along. Please help me. I'm really desperate.
Attached are a picture of both my chocolate GSD puppy and my 4 year old GSD.