I have a pair of Smooth Fox Terriers, so probably not a million miles apart.
Terriers are great dogs, and are always very alert to whats going on.
Our two are intelligent and learn quickly - faster than the owner on occasion !
h is very prone to turning deaf when off lead and is extremely stubborn.
As we have a pair, they tend to keep themselves amused and as a pair are very close.
They are happy to walk all day if required, but by the same token, if its wet or cold are happy with a shorter walk.
h is a total Houdini and will find any tiny escape route from the garden possible, but I think we have that covered now.
Cats and Terriers (my two at least) DO NOT mix. In fact, Millie has caught a starling in the garden before now.
Be prepared to put the effort in, and any dog will reward you for a long time. Go ahead and enjoy - Pics ASAP please !