How much do the carts weigh?

The weight of a car varies from less than 1lb. for very small animals to 12 lbs. for pets >100 lbs. Four-wheel carts are heavier, but totally supportive for all four limbs. We have put forth a major effort to design light carts that reduce the burden on an already disabled pet. The specific needs of each animal must be considered in the assembly process as we custom fit each pet.