Stress alone does not cause the eyes to randomly pop out. It is not a usual occurence. It is generallt attributed to an injury, a blow the head cause swelling, etc. Not worry that the Pugs eye will just start falling out as it walks about the house, lol.
Totally thread-jacking the original post-- sorry. The Peke I was talking about had no damage to the outside lid area or really to the eye itself, but it was just hanging on by the optic nerve. The vet didn't think there had been an actual injury to the eye at all. That is why that vet thought it was due to stress.
It is called eyeball prolapse and if you google it there are articles on it. The breeds that are most prone are Pugs, Pekes, maltese, Shih Tzu and Bostons.
The boston that I was talking about that lost an eye playing with the rotty, there was a tear in the corner of the eyelid and they figure the rotty possibly hooked the protruding eye with a claw a bit.
I have owned pugs for a while and I have never had an eye pop out just because or due to playing and mine played with boxers :)
I always raise my eye brows when I hear a breeder tote that linebreeding results in a higher occurance of genetic problems... When you consider that outcrossing is really a "grab bag" when it comes to traits and defects you're looking at exactly the same health risks - or higher. And it would be along the same lines as inbreeding. The difference is, when you line breed (and my idea of a line breed is breeding cousins, or 1/2 uncle to 1/2 niece at the closest. One of my linebreeds that I have done was 1/2 great uncle to 1/2 great niece) you have a control in the "expirament" and you can slowly concentrate attributes and faults. I like to do a line breeding, then an outcrossing, and then a linebreeding again. If you cross fault everything with the outcrossing to fix anything you're not happy with (and I'm looking at temperament as well as conformation) then it can be really useful. And regardless of whether it's a linebreeding, an inbreeding, or an outcrossing you really should be dealing with healthy dogs from healthy lines. Really, your problem arises when the lines you're dealing with have a history of the same recessive problems...
You have to know what you're doing and you have to deal with sound lines - but that works for outcrossing as well. My linebred litters seem to turn out better than my outcrossed ones - especially when I line breed on a great dog. Usually a breeder doesn't linebred or inbreed just because they can. They are working towards something. And I NEVER consider a good breeder to be one who is only working towards one thing - whether it be a show dog or good temperament. The whole package should be considered as well as health.
As far as linebreeding. If you go back far enough in all my dogs pedigrees there is linebreeding. I imagine it is like that in nearly all, if not all purebreds. I just don't care to personally partake in it. I outcross, and I think that is healthy and necessary that some breeders do that too.
When I refer to inbreeding, I mean related MORE closely than linbreeding. I know of people who show; breeding mother to son, father to daughter, grandfather to granddaughter, LITTERMATES. There rational is the same as people who line-breed and they don't see what they are doing as any different. There has to be a line some where, right?