My (24F) boy Zero is 13 weeks old, and we've just started our ground adventures after lots of socialising from my lap. We live in an apartment complex with no garden so we're finally starting toilet training. 

For some further context, I am a full time wheelchair user with a neurological condition, and my Zero is my prospect service dog, working with a charity to owner train him. I have very little mobility in my lower body, so the typical self defence advice doesn't really work for me. 

Well yesterday morning, I took Zero for his morning pee and a little walk around the community garden so he could do all the big sniffs, and burn some crazies for the day. We then stopped on the grass outside of the garden path, and we were just working on some training (sit, stay, down, leave it, find it ect ect). Whilst I had him in a sit, this Chihuahua came darting through the bushes, and went straight for Zero's neck. This dog lives in a different apartment block in the complex I live in, and is known for his aggression and bite history... Quite frankly no idea how they're still here but regardless, Zero stayed completely still in his sit, I kept his leash loose, and I just grabbed this dog by it's harness and held it back until the woman came and took her dog back. It all happened so quickly I didn't really have time to think, but I didn't want my boy to get hurt, or have his career damaged before it's even begun. It's safe to say he got lots of praise and rewards after the fact, as he took it like a champ. 

What worries me is what I should do if it happens again? I can't block my boy as I cannot move my wheelchair fast enough, and I don't want to pick him up if that'll make him feel more vulnerable, besides that I don't know how much longer I'll be able to pick him up, as he is truly growing like a beansprout!! What do I do if it's a bigger dog? I'd rather be prepared and not need it, than unprepared if I do. We live in a large apartment complex so it's just riddled with untrained and reactive small dogs. I'm trying to get him away from the area a little bit at a time so that we're away from the immediate risks, but his little legs will only take him so far at the moment and I can't drive due to my condition 🫩 I also worry that because all of these dogs are small, if my boy was to react back in defence, he could hurt them significantly more than they could hurt him, and I don't want him getting into trouble for reacting if he's being rushed by these tiny dogs 🙃🙃

Anyways, here's a PFA of my little Zero, my angel baby. I'd love any advice you can give me to protect my boy ❤️❤️ my head is spinning and I'm overthinking, please help a girly out 🥺❤️

My 13 week old puppy was rushed by a reactive dog with a bite history yesterday