Today, the scariest thing in a while happened today! With Rossi my very high prey drive young staffie/GSD cross and my friend with her lurcher X puppy we went out for a lovely stroll and boys where playing brilliantly! They trotted off just in front of us around a corner when herd a "no!" Being shouted. I sped round the corner to see a huge white horse and rider and both dogs stopped dead in their tracks starring at it. Thankfully they both came running straight back with one call so we could shove them both on their leads to prevent any further danger and the horse trot by few! What is the likelihood of a dog spooking horses? I've always been weary as Rossi has chased deer in the forest. He does come straight back when he realises he can't catch them but I can't risk it with a horse! What are your experiences with dogs around horses?