If not treated promptly the shock may progress to death. Pulse is weak and rapid. Breathing is shallow and labored. Gums are pale or muddy. Difficulty standing and may be unable to contain urine or stool.
Shock requires immediate veterinary attention.
To administer first aid make sure the cat's air passages are clear. Help the cat to maintain it's body heat by covering it with a coat or blanket. Try to keep the cat's head lower than it's body. Massage the legs and body muscles to encourage blood flow. If possible, phone the veterinary hospital to let them know the problem and that you are on your way.