She has now met both Bailey the Great Dane and Sticky the little dog through the dividing gate in the house without any fuss. In fact she is quite blasé about Bailey now which is very hopeful for her settling with other dogs! If the weather is more forgiving tomorrow we may try to introduce her to Bailey out on neutral territory, all safely and gently while on long leads.
She has eaten hungrily again today but as she's a little underweight we're giving her three smaller meals rather than two larger ones. She is showing absolutely no signs of resource guarding aggression but is a little anxious around her food - indicated by extreme excitement and gobbling it down - so we are giving her lots of time and space to relax and teach her that her food is not at risk. If we were to start messing about with her food now like giving her a piece at a time, taking her bowl away (even to refill it) etc this would all simply make her more suspicious of us around her food. For at least a week we will leave her in peace to enjoy her food and relax.
It is still simply too hot to exercise her any time before late evening and even then it's a little too warm but the little exercise she has been getting, she has been very good. She is infinitely more relaxed on a longer lead than a shorter one and is learning to recall short distances now. Her general fitness level isn't good but in a growing pup this is to be expected as they should be road walking for more than about 20 minutes at a time anyway to protect their developing joints.
She was left indoors alone for an hour while we went out briefly and she simply went to her bed and slept (we monitored her via Walkie Talkie!) but I've been spending a lot of time simply ignoring her while working in my office, like now, where she has learned that even when humans are around, unless they're asking for interaction, they're really quite boring a lot of the time and she may as well chill out and snooze, especially in this heat!
So many people make so much fuss of a new dog in the home but the exact opposite is crucial; starting off with as little interaction as possible and building it up slowly. It really does make for a much happier, relaxed dog.