HA... Nitshcke used to actually back-up at the door when he realized it was raining.... only thing you can do is take him out on leash and stay till he does his business
Jack my non bully will melt if the rain touches him, unlike Wilson who I have to drag back iin. My older dogs always tolerated the rain but usually they'd stop at the door, see the rain and then it's me saying, go on go potty. I make them go out and sometimes I have to walk out with them for just a moment. We did that wih Jack when he wa 4-6 months and now he goes out when we direct him to, again of willingly cause he'll melt. just be persistent and they'll go. I Keep an umbrella handy too.