I've started walking the dogs separately in the afternoon as I need to work on the spaniel's reactivity and socialise the pup. Actual walking is going really well, but the problem is that the pup isn't used to being on his own. He went from his litter to our home, and has always had the spaniel for company. As soon as we leave his sight, he howls and barks. I'm out for maybe 15 minutes with the spaniel, and he is still creating when we get back. We're detached, so I'm not bothered about neighbours etc, just concerned that he finds being left so upsetting. To top it all off, when I swapped dogs and got back from walking the pup, the spaniel was kicking off
As far as I know, they don't make a peep when we leave them together (Never heard anything when we get back or leave, anyway). Is there anything I can do to stop them fretting?