In 18th-century England, "carriage dog" referred to which dog breed?

Well, I'm English and I've never heard of carriage dogs...interesting

Moray, Thanks, you're absolutely right!

Player Say what!?, As with most animals, it's all in the training. Without training 1 horse can kill 1 attacking dog. Not safe.

Can I assume it's not safe to have them around horses even today? Well, except for the Budweiser Clydedales.