we're about the same height and weight and Katie is roughly the height of a lab (I've not actually measured her - one thing to do after I've slept). She's around 22KG give or take a few hundred grams. I've had to climb over styles with her when we've been out walking and it's not something I would try to do often, it's not the weight it's the wriggling that gets me everytime, I think I'm gonna drop her. I think she thinks I'm gonne drop her!
I'm gonna go into pets at home tomorrow and look at the wormers so I can edit my post and give the correct name thats on the packet otherwise it'll bug me.