I'm a new player but thus far I've had to earn it it was very confusing at first I spent the $7.99 and thought that I would have unlimited dynamite however you have to earn energy in order to get one dynamite had to explain this I wouldn't have purchased the dog

Once you purchase it for 7.99, the dog becomes your companion. However, you are earning energy points alongside the dog. Once you and the dog reach 100 (Edit: original said 100. really is 700 i believe.) energy points of explored area, they are available for 1 dynamite. You choose the area you would like to clear, and the dog applies 1 dynamite explosion. This add on is only available throughout the specific seasonal them. If another adventure becomes available, you would have to repurchase it.