My God, that's horrible.

Molly isn't great with brushing either; and just to my luck, she has the most hair.

I'd never shave her though. I just can't fathom the thought of seeing a shaved Collie. Plus, the coat can take quite a while to grow back, and it can grow back abnormally, as in the undercoat growing back faster than the outercoat, producing a different 'texture' to it.