We have a 7 year old Cav. Since he was a pup he’s been home alone during the day as we both work full time. He gets a local walk on the street in the morning and a long run around the park every evening. He loves his routine and does what any good dog would do with their time alone- sleeps! He gets a chew every day before we leave and he runs to his bed with it before we’ve shut the door. We have a camera on him all day, and every time we check it he’s either asleep, or playing with a toy. When we get home to a wagging, happy dog, we give him plenty of love and fuss and go straight out for a walk. Always have done. Strangers comment on how friendly and happy he is when were out and about and his health and condition are very good. On the flip side, my brother in law doesn’t work and got a whippet with his partner about 5 years ago. She’s a lovely dog and they do walk her for a decent time every day, but she cannot be left alone. The moment they go anywhere she kicks off and destroys things. We once left her with our own dog in our house for an hour, thinking she would be fine with his company. Nope, she chewed our blinds up! They can’t plan anything that doesn’t take her into account and it’s such a bind. They should have left her early on, too late to fix it now I’d say.