I took Aiden for his second ( my first) vet visit with him. He's already 5.4 lbs and he's 2 mo. When do they stop growing/gaining. I only feed him Iams food/treats. He's doing really well. Hated the shots, of coarse. He goes back in 2 weeks for another shot. I'm curious, I never had my male Dashund neutered ,he's now 12. I have no dogs in my neighborhood,at all . We live on the country,way in the woods. I'm debating whether to neuter Aiden or not. Help

I also trimmed his ears. They're still floppy....