 therefore you're actually creating more more anxiety more aggressive more assertiveness on his part so I would do some solid training at this point I don't care how old the dog is they can be trained at 20 years old as far as I'm concerned and then little by little if you expose him to small dogs from a distance at first and every single time it's a positive relationship little by little he will come around because if he associates small dogs now with positive things what we call counter conditioning he will come around now I remember years ago