Welcome! My name isXXXXX am a UC Davis graduate, and currently, a Medical Director of a veterinary hospital.
I am sorry to hear about this concern for Corey.
This is a difficult question.
Well, we can't differentiate, at this point, if this is solely due to injury involving the back right leg, or if there is a additional concern for injury to the spine, like a disc herniation.
The most common injuries for a hind leg include:
1. A partial or complete tear of the cruciate ligament in the knee (stifle).Cruciate Ligament Tear
2. Exacerbation of degenerative joint disease (arthritis) in the knee or hips Hip Arthritis
Note: Hip dysplasia is early age arthritis due to genetics, whereas, many older pets can have age-related arthritis changes in their joints due to age.
3. Any other soft tissue injury (tendon, muscle, ligament)
4. A fracture
5. A paw trauma, fractured nail, or a foreign body in the paw.
However, most of this list doesn't apply to Corey other than the concern for possible fracture or a cruciate ligament tear in the knee (very very common!)
Considering the degree of difficulty walking, as well as the tail changes, I really think Corey needs to get examined and as soon as possible. He will need very good pain management, as well as, anti-inflammatory therapy.
The vet may also do a brief neurologic examination as well to ascertain if a specialist is going to be needed. Expect x-rays of that right hind leg for sure.
I would not attempt to give any medications or over the counter anti-nflammatories. Vet visit ASAP.
I hope that information has been helpful.
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