
I have always had my bitches spayed when pups are 12 weeks old. As to the playing, don't worry!
I once went to collect a pup of mine from someone who found they "couldn't cope!" :-(
I had just had her mum spayed, and it was quite emotional seeing them recognise each other. Naturally, I couldn't let her go a second time.
It is a joy to see them together, now at 3 and 5 years old, they are 2 madcap partners in crime. Go for it! :-)