Reddit reviews Dog Behavior: An Owner's Guide to a Happy Healthy Pet

By the time a male puppy reaches the age of 4-5 months, his testosterone levels start to rise. The male hormone will keep on climbing and peek around 10 months of age, then very slowly go down to reach adult levels around 18 months of age (Dunbar, 1999). These ages can vary from breed to breed and among individuals, but the important factor to keep in mind is this: adolescence in dogs generally occurs between 6-18 months and during that period, their brain is flooded with more hormones than ever. High levels of testosterone lead to greater reactivity with faster, longer and more intense responses to external stimuli.

You should call around to the doggy daycare places in your area (assuming you have some) and the local pet shelter/rescue. You can often find cheap(er) classes or shorter basics sessions. In Seattle, we can pay as much as a gorillion dollars for classes, but there are lots of cheaper classes for $150 ($3euros) that are a few weeks long.

Also, if you have not picked up any of the books by Ian Dunbar yet, do so now! They are an incredible resource for connecting with your dog and learning how to redirect her attention to you when you need it.

http://www.amazon.com/How-Teach-New-Dog-Tricks/dp/1888047062
http://www.amazon.com/Dog-Behavior-Owners-Guide-Healthy/dp/0876052367