Great questions Adrienne, and thanks for the quick response. You will see from my answers that Mac is a bit of an enigma.
A trainer at Tararua All Breeds training club (New Zealand) suggested I give him a treat every time a dog is nearby to make him think dogs were good. I have to say I thought it was odd at the time as I had always understood the best thing to do is to ignore and carry on with absolutely no reaction - no words, no tightening of the leash, no nervousness (which the dog will pick up). Very keen to hear your thoughts on this. He is getting better with dogs on a leash, say up to around 10m away - much closer than that and he gets nervous. When I first took him to training he could not cope at all, and the trainer advised me just to hang around the edge of the field - he now has a Halti nose collar which he hates and has managed to take off, so I am looking at the Halti harness. I had him on a choke chain at first, but he really didn't care - he would just keep on pulling, and I didn't want to tug at him with the choke on. He is a dedicated and determined puller, when ever he pulls I simply stand still until he comes back to my side, and then we start again. Some walks are literally one step at a time.
Here's the enigma - he goes to doggy day care twice a week and, after a challenging first few weeks, he is now okay with the other dogs - not all of them as the smaller dogs don't really like him - his manners are a work in progress. But as soon as his lead is put on when I pick him up he changes and gets tricky - I don't want to say aggressive cos it really isn't, but its not quite fearful either - may I'd say its like making a point. And yes, he barks at nothing at home. He always lets me know when someone comes round, which is actually quite good as I live alone, and I'm in a rural situation, but every so often he barks at ghosts - I walk him around to show him nothing is wrong and he settles quite quickly. Thinking about it its often when he rouse from a nap or quiet time. Though he barked furiously at the wood pile after it had been delivered, but he settled quickly once I walked him around it and let him sniff at the wood. He sits quite happily now as I stack the wood into the shed. No idea how he will behave when it gets colder and I set the fire (its a wood burner with a sturdy fireguard - I have a 2 year old grandson.
Mac isn't my first dog - I have previously had both a spoodle (I think they are called Cookapoos in the US) and a German shepherd, but Mac is my first rescue dog. He's lovely, very loving, very intelligent and quick to learn albeit pretty headstrong, and I am sure that once I have sorted his problems he will be a fantastic dog. I have started to introduce him to agility - just a small jump in my back garden, and it took him less that 5 minutes to learn "jump" - with clicker and treat as a reward. If I think about the 3 Ds - duration, distance and distraction - he sort of loses all training the minute he gets distracted - I put that down to him still being a puppy / adolescent - and I work mostly on the duration and distance training.
Still going through your Obedience 101 and enjoying the course so far - I am using the sit and down as reinforcement and have now started Leave It / Take It. The lab in him is proving a challenge at the moment - but I am the collie will kick in soon.
I look forward to your response. Apologies if this is a bit of a novel
Cheers, Lesley