Hi I have a 13 months old english sheepdog, That loves to go out but when we get outside we go a few steps then she sits down on me. She has started doing this the last few months. she walked fine before...  We sent her to a training school to see if this would help. But when she came back she did it again... She is my 3rd o e s. strange don't know why she does it. we have taken her to the vets and he has checked her out and she is fine.

i also have a 13 month oes have you checked she hasnt got a bit of poo stuck to her as i know how easy it is to get stuck in their fur  and it can drive them mad  good luck

Have you had her checked by a vet ? it could be her hips.