Quote Originally Posted by Jessika
Males and females fixed before they are sexually mature don't ever seem to be as sound physically as those who were fixed after their sexual maturity. I guess this is just an issue for show dogs though. If they're pets it probably doesn't matter either way
For myself I found this to be just the opposite. My female had a litter of puppies (before I got her) and she has more problems physically than I can even list. She almost died the first month I had her. She had mastitis, she has had cancer removed, her hind end is crippled with arthritis. She can't go for walks, she can't get in the car, and she is only 5. On the other hand, Cracker was nuetered at 6 months of age and is sound as can be. No physical or health problems whatsoever. Very healthy height, weight, and body type. Never a bad step. I don't think there is a hard and fast rule to follow and you will find there are lots of opinions on the "right" way to do it. I personally prefer to do it at around 6 months of age, as does my particular vet.