well it depends either they are just getting too old or they might have some fracture.
Hip displaysia would be my first guess
No they have puppies out of their vaginas
there are many causes: Trauma to the spinal cord between thoracic to lumbar-sacral region. Any brain lesion/mass/tumor. Any infection of the brain/brain stem(spinal cord). Rabies. Diabetic neuropathy. Osteoarthritis of spine. osteoarthritis of rear legs. Intervertebral disc disease.(disc prolapse) Any blood clot in abdominal Aorta. Congestive heart failure discospondilitis. Iatrogenic (caused by human etc.) nerve damage. Disuse atrophy (muscle not used due to other systemic disease) Hip dysplasia. old age.
the puppies
Between your legs at the rear.
Seals do not have legs they have 2 front flippers and a rear tail.
what causes rear wheel rotors to heat up
Strong rear legs.
there antlers and their rear legs
The group of muscles at the rear top of your legs is called the hamstrings. These muscles are responsible for bending the knee and extending the hip.
18. Five on each front foot, and four on each rear foot, the same as other cats.The same as any other cat, five on both front paws and four on the rear paws.
it has enlarged rear legs for jumping and the back legs are facing backwards to spring into action and run (jump) away!!!