Collie you can get a lassie or a border collie. They are loyal, protective over 55 lbs. As far as heat take to groomer and get a shave in april be fine through summer.
I had a black and white border collie growing up, male 85 lbs. Didnt matter who you were, how many times had been over you didnt get out of your car without us there. He was hit by a car at 9 months, we never trained him but non family yeah you would think you were going to get ate but never bit anyone, no one had the sack to call his bluff. Very loving dog.
Collies as a breed very smart, tons of energy,loyal,protective. They are working herding dogs. Theres long and medium hair lengths. Black and white variants common some have brown mixed in also.
If want a short hair, tough,smart loyal,protective blue healer. Blue healer are wotking herding dogs with cattle. Seen them get stomped because hit the ground in front of 50 pissed off full grown cows on dead run. Once the healer stopped rolling he got up ran right in midle of those cows a cut 8 cows out that were needing looked at. To me nothing as tough, loyal,energy or attitude if screw up as a blue healer
Heres a couple border pics.
