One of my Schnauzer's lately has a problem with my 35 foot long hall. There is a hall table at one point in the hall with some pictures on it. The dog all of a sudden stops at the table and won't procede past it. I''ll be looking for her and hear her bark a time or two and go and find her at the other side of the table like there is an invisible wall that she can't get past. Sometimes she looks at the A/C vent that is across from the table. I go and pick her up and carry her across the divide and she is ok. I don't know if something fell off the table and scared her or the air coming out the vent is the problem. It has been going on for 2 weeks now. I have put a leash on her and tried to get her to pass>she puts on the brakes when she gets close. Anyone have anything like this happen? David