How can we help a Growly Gus or a Fearful Fifi?

We're often perplexed, shocked, embarrassed when we realize that we have a dog that's reactive in some way - extremely fearful, or when it shows some form of aggression. How do we help these dogs?

Here are 2 articles that can help us understand the situation better.

"It's Only Funny Until your Dog Runs Out of Spoons" 

"Fearful Fifi and Growly Gus - What Makes Your Dog Afraid"

CCO Kiyo (R) working with M (L),
who displays fear reactivity towards other dogs