Our two are also hardy Scottish bred cockers, Milly's from the glens around Huntly and Chaz from the hills above Deeside but, if it's really chucking it down, (Scottish equivalent- a heavy mist
) or during the hours of darkness, our two have their reflective jackets on which do keep their backs dry but allows their undersides to get dripping wet.
When we get back home any mud is hosed off before embarking on the battle of the towels.... Two humans, two cockers, four bath towels, game on, pandemonium
...then their equafleeces are put on to wick away the remaining moisture.
If the fire is on in the living room they usually lie down at opposite ends of the hearth otherwise they've each staked a claim to their own radiator, at opposite ends of the room.
Their absolutely favourite drying out place though is in the kitchen where, instead of wall radiators, we have two fan assisted plinth radiators. Just above floor level and at an ideal height for cocker spaniels, they pick their spots and fast become Immovable objects
Bob