Hi I am new to this. We have an American bulldog/staff mix. He has major issues with the ligaments in both hind legs. We have been told today he needs to lose 10kg ASAP so he can be operated on. The vet said not to feed him at all for the next 10 days, he is also not allowed to go for walks, climb Steps etc Has anyone any idea how we can safely do this without causing him too much stress Thanks in advance Ps. I meant safely without listening to the vets advice.