Seems those "In-floor" cleaners fail an awful lot. We are constantly seeing posts here from people having problems with them. You may want to get a robotic like a Blue Diamond instead. I swear by mine, and it pulls out EVERYTHING! Even though a BD is expensive (about $1500) it's got to be cheaper than the "in-floor".

Do realize that a dog is many, many times dirtier than a person, something like 30x according to my vet, who does water-therapy for dogs.

But....it's your pool.