Lists of the most difficult dog breeds to ... toilet break during the day. Some greyhounds never receive any formal toilet training, and for a few of them, all the world is one big concrete ...
If your dog won't potty on the grass, suspect a substrate preference being the culprit ... DVM360, Canine housetraining, Part 3: Elimination training tips, retrieved from the web on July 7th, 2016.
There’s no single “best age” for potty training, because all kids are different ... or if you notice they are holding it in for days at a time or seem to be in pain, give your pediatrician ...