So do you have a chart of sorts which tells you what the comparitive weight is, from drag to wheels?
My sled is a plastic kids sled, with a flange and a pipe where the seat is. I can slide weight over the pipe. The bottom has 1 inch washers and 1/2 inch nuts protruding from the bottom to hold the flange on, so there is quite a bit of drag. Tallulah can handle 10 pound like it wasn't there, 25 with effort, but 35 she cannot start on her own, so we don't go that far. She is only 37 pounds, and we pull on grass.
I have been worried that if she can't pull 35 on drag then she will not be able to pull 75 on cart, but it sounds like maybe I am wrong?
no charts more just experince
when you get more serious about traing and competeing you really learn your dogs limits
grizzly's mile drag limit is 160-200lbs-thats what he will give me full mile pulls
grizzly' cart limit is between 3000-4000lbs
comparitively speaking 160lbs drag = 3000lbs cart
these are just examples not proven facts
my drag is a 32"square-4x4posts bolted together to make a stoneboat(thats what they call it with horses)
by using solid 4x4s he won't wear through in
it has quite abit of resistance
with a 35lb dog i would use a chain
chain will drag over most all surfaces
to add weight you attach window weights to the chain
the window weight are torpedo shaped and usally weigh 3-6-9-11lbs-so you could add alittle weight at a time
i think the bolts sticking out under your sled dig in too much with the 35lbs
i would quess that by pulling 25lbs skid=at least 250lbs cart
most dogs can pull 300-400lbs easily
the key is teaching her she can move the item shes tied to
are you going to the enfield pull?
do you have access to window weights?
i have quite a few i don't use i could give you