Thanks Moboyd for your help.

Can I just reiterate that Maisie wasn't coerced or forced to go on a walk. There is a recreation ground immediately adjacent to my property so as I said we could have been back in the house within minutes. Maisie was very keen to go on a leg stretch and the botb says 10-15 minutes a day is ideal.

I wasn't paying attention to Maisie at the time we met the puppy as I was talking to the owner. It is entirely my fault that the attack happened because of my ignorance. I am just so pleased that the pup wasn't hurt though it looked serious. I've no idea what the pup had done to make Maisie so cross with it but I can only assume that it had gone round the back of her.

Leashed, Maisie lived with Airedales and Labradors previously and when out on her walks with me if we encountered other dogs she was friendly and happy to say hello to them.

Also, I have three other dogs all entirely different from her. So I don't think Maisie is fazed by other dog types.

As you have described, Maisie does want to be outside of the whelping room if the puppies are asleep! Is that Airedales or all dogs I wonder?

Maisie has just finished a course of ABs and her discharge appears a bit lighter today.

Another question answered if anybody can please!
How much for a crossbreed? I don't want to undersell them but at the same time they will all need a forever home.