lol those screams were very low compared to Electra, Electra has a high pitched almost human sounding scream lol

I have 2 BCs and a Toller

BC's vary a LOT keep that in mind, this breed is rarly intermixed, meaning that there are several "types" of BCs that are so differnt from one another that they mid as well be seperate breeds, so here is a break down:

"Barbie" Collie's- these are the dogs bred for the show ring, how much they differ from real BCs depends entirly on how far back the show breeding goes, for example is the dogs 3 generation pedigree is all Barbies, the the BC you get would be very calm, relaxed, they wont even be in the same ball park energy wise as a real BC, they slow down at an early age, they will be blockier, thicker boned and slower.

Border Collies- real working BCs bred from proper working breeders(IOW not just a random farm) these will be fast, high energy, they are generally lanky, and incredably smart, but overall looks will go from one extreme to the other as these dogs are bred soly for their working ability.

"Sport" Collies- BCs bred for sports, these dogs are bred from the highest drive and fastest BCs, they are EXTREMLY difficult to handle, however they are incredably fast and very very focased.

"Pet" BCs- these are the BYBs and PMs, the pet bred BCs are mixes of all three types above, so you really dont have any idea what you will get lol

Tollers- very active breed, but in my experince not near as active as BCs lol mine anyway is dead tired and can barly move when my BCs have barely gotten started lol however like BCs they are not for everyone, they are very good at things like agility, but as other mentioned there is the scream to contend with lol