I don't have a lot of experience with these dogs but i've had a full Whippet for around 6 months and it sounds as though your Beddy/Whippet has the temperament of a Whippet. I have a GSP and a Weimaraner and they're always on the go, always full of fun and energy but my Whippet just lazes around doing nothing most of the time and when at home, you wouldn't even know he was there...............but put that wee dog in the field and he springs to life. When out on the lamp he's totally alert and focused. When out during the day, he goes and hunts and will charge through anything if there's a scen