Pizza- I dont know about the "sneezing and wheezing part"...but when Tobi keeps taking herself to the cement areas in my yard she gets re-routed too. If there is a way to clean out the yard (like the nails and stuff that could hurt her) then let her roam everywhere, I would do that. Tobi is always sooooo particular and when I re-route her in the yard it ticks her off and she turns around and goes back where SHE WANTS TO

The last time she layed, not lastnite, but before, UGH was beside a tree FULL of POOP! But I had to stay...gag...thats where she wanted to be!
But....30 minutes, a little too long in my opinion...(not to have her out, just to look for a spot). I would go out daily for about 20- 30 max minutes and just watch. If she is gonna lay in the yard, she will gravitate to a specific area more than likely and it will happen "pretty quickly", like within 10-15 minutes or sometimes less...she may have just been scoping it all out today since it is new and will be ready for later to lay!
It took Tobi 3 times in the yard to "smell and feel it out" ..(I think) before she actually found HER spot the 1st time she layed. Sooooo.....
I would say hang in there.
If your girl walked "like she was on a mission", she will find her spot soon.
Any other ?'s...just ask! I'll help if I can!