Hi, my 3 year old staffy began loosing his balance slightly around 3.5 months ago. We noticed he is knuckling his front right paw. We took him to the vets and they wanted us to do an MRI but we can't afford that at the moment Over the last few months he looses his balance when walking and walks with a head tilt to the left. He also never barks anymore. He doesn't seem to be in any pain and still has full sensation in all limbs. His eyes also flicker side to side. No vomiting and still wants to go for walks and loves his food. I feel like if it was vestibular disease it wouldn't be lasting this long? The vet also checked his ears and everything seems to be in good health. I'm really hoping its not a tumor. Any help would be appreciated. It's been such a struggle watching him..