My baby is getting old

Ive had him since he was a puppy. I remember him roaming around in our apartment complex and I asked my dad if I could keep him. He always said maybe. That always meant a yes. Gave him food and he came to me 💕💕 Are bond has been amazing ever since. Everybody says he looked different. He is a Thai Ridgeback which is a rare breed I don't know if any others have one. I'm not quite sure if he is a purebred or not. He's always bern my guard dog and has stuck through everything. He is usually a inside dog but it was storming really hard so I brought him in. He's getting old I think he is around 10 years old. I'm really thinking about keeping him an inside dog but only realllly bad habit he has is hiking his leg up every 10 seconds. Any advice? I know hes older maybe I could help him.