When to spay a Giant Breed Dog?

[lv4dogs]

Here's one of the articlees I was looking for. I still don't have time to continue searching but I hope it helps.
http://www.caninesports.com/EarlySpayConsiderations.pdf

[lv4dogs]

here is some more research I stummbled upon:

The following text was written for a labrador site:

A study by Salmeri et al in 1991 (Salmeri et al JAVMA 1991;198:1193-1203) found that bitches spayed at 7 weeks were significantly taller than those spayed at 7 months, and that those spayed at at 7 months had significantly delayed closure of the growth plates than those not spayed (or presumably spayed after the growth plates had closed). The sex hormones close the growth plates, so the bones of dogs or bitches neutered or spayed before puberty continue to grow. This growth frequently results in a dog that does not have the same body proportions as he/she was genetically meant to. For example, if the femur is normal length at 8 months when a dog gets spayed or neutered, but the tibia, which normally stops growing at 12 to 14 months of age continues to grow, then an abnormal angle may develop at the stifle. In addition, with the extra growth, the lower leg below the stifle becomes heavier (because it is longer), causing increased stresses on the cranial cruciate ligament.

Also in your link is reference to a study undertaken by the Golden Retriever Club of America where they state in their results that:

Both bitches and dogs neutered at < 1 year of age were significantly taller as adults than
those neutered at > or = 1 year of age or intact animals.

[luvofallhorses]

I would spay her as soon as possible.