I hope you have better luck finding a cure to this than I did. I have an almost 9 yr old Springer that has been doing this for at least 8 yrs. The only solution is to pick it up. Some people say put garlic in their food and various other things but the easiest thing to do imo is to pick it up. My Yorkie has done this occasionally too, but what is worse, they both try to eat out of the cat litter box.
We built a large crate around the litter box to keep the Springer out but that doesn't work with the Yorkie. We just have to keep it clean and keep her away from it.
I hope someone else might be able to offer some advice.
