Ive collie cross and he'll chase anything from bag in wind to fox in field it moves he nails it and ive 2 heavily whippet cross dogs just started tonight one followed beam striaght away got 2 back car swapped over dogs took other one put beam on rabbit just sat there lookin at it till got it to run went and missed next one put the beam on and dog was lookin behind it like everything sum are smarter than others dont matter what way your made.Oi the one that caught was my wee mans and mine was tha pie so there one happy 9yr old tonight lol atb flipper