Hi, mollie, I'm not an expert, but we have been having a 2 year old male grey in our lives for 4 months now.
He is an extremely excitable dog (never raced as his trainer felt he was 'too playful', read 'totally crackers'
) and does that greyhound 'chittering' thing at the drop of a hat: when I come downstairs in the morning, when somebody gets his food ready, he will chase and retrieve a ball to the point of exhaustion, he is very bouncy and jumpy-uppy (we are working on that).
He has also managed to kill a (feral) cat - I feel terrible about that, I clearly had underestimated just HOW fast a grey can be, but I thank my lucky star that it was not somebody's beloved pet
.
So, other dogs: he is hugely interested in them. Smaller breeds clearly confuse him ("You are not a cat, but just what are you?"). He loves to play with other dogs, but can be rough and I only let him off lead in fenced in areas with other larger breeds (usually friends' dogs, labs, pointers, retrievers and the likes). He is reactive to timid dogs which can be quite difficult to manage - the smallest confident dog he is absolutely fine with, anything that cowers or puts their tail between their legs and back away, he takes an unhealthy interest in.
I now make a point of allowing a sniff'n'greet on lead, and then swiftly move on while praising him (he is not very food-driven and it is hard to find treats he is motivated by). I don't linger and I will move on from any kind of play if he gets all stiff/alert/chittering/startspanting/gets an erection (oh yes, siree, he does that too when something terribly exciting is going on, neutered or not, the hydraulics are all working!
).
He has settled down an awful lot since we got him and I am hopeful that that will continue.
I'd continue encouraging contact with other dogs and always praise/reward good behaviour.