Skip to content. Quick links. Puppy won't pee in the rain or on wet grass or concrete Discuss training topics and dog related activities, such as conformation, obedience, dog sports etc. I tried getting Natsu to pee on the grass in the rain, and she refused, looking up at me with a "why are you making me do this? DH took her out 2 hours later the grass was wet and stood outside for 20 minutes and she still wouldn't pee on the grass. An hour later, he turned around and noticed that she had peed on her bed.