Hi, so my baby does not like to go potty outside at all. He’s always been disinterested in sniffing around & lifting his leg. I’m not sure why. I have two other pups that go just fine outside, but this one never does. He always hids or waits for everybody to go upstairs to pee/poop on the pad. We don’t ever yell at him if he makes a mistake either. So not sure why he has developed this habit... does anybody else have any tips?