Like you, I only have a small herd and they're very gentle girls. I have a Sweep Tub and attached alley way that has been without a doubt, the best $$ I've ever spent. For routine worming and vacs, I just put them into the alleyway (jammed in so they can't move much) and stick away. If I do need to squeeze a single animal, then I "squeeze" her between the sweep tub gate and the straight wall (with the entrance to the alley way blocked up) of the tub part, then throw a halter on her and snub her short to the pivot point of the gate and wall to hold her head. I'll throw a heavy metal bar behind her, then do what I need to. So far it has worked on pulling a calf, milking a not so cooperative mama, and doctoring some hairy heal warts. Anything bigger, I haul to the vet. Chance are if I have to hold them in that tight, its a bigger job than what I can handle by myself. Did that make any sense? Basically, its "squeezing" them in between a gate and a wall, with their head tied to where the gate hinges the wall.