Twice a day, my dog goes nuts. At 8 am and 7 pm, she races around the house, crashing into things and barking like crazy. You could set a clock by her. What’s up with that? ~ Dylan
Lots of dogs get “the crazies” and will expend excess energy in the way you describe.
For those dogs, I recommend increasing their physical exercise and presenting them with some mental challenges as well. If we get their brains and bodies working, the problem usually goes away. (Julie Fudge Smith and I talked about this in episode 9, Fun with Food, on the Your Family Dog podcast. You may find some suggestions there.)
But the fact that you can identify specific time periods makes me wonder if this could be a food sensitivity. Many dogs have difficulty digesting corn, dyes, and artificial preservatives, which are all too common in dog foods.
Try switching your dog to a food recommended by Whole Dog Journal (which I think of as Consumer Reports for dogs). Give her two months on a high-quality food and keep track of her behavior. I’m betting you’ll see a significant decrease in the crazies at your house!