Need help with Lab breaking his nails and bleeding

<b>hi my 11 years old lab is breaking his nails and bleeding in the inner side and it's making his walks impossible. I have consulted vet he told me it's due to zinc deficiency and gave me tablets to feed him but it's all coming back, I am here for second opinion or changing vets. Please help me get the best decision for him. </b>

Hello - and that does look to be painful.  Zinc deficiency may not be the only explanation for this, but of course I don't know how many tests or how much research about your dogs' Zinc availability or diet, the vet has done.  It is relatively unusual for a healthy dog with good control of their limbs to repeatedly walk on a nail to such an extent that they file it down to the quick - this must hurt.  Perhaps the dog may be arthritic and / or overweight, so cannot help but to weight-bear in an awkward way (perhaps it would be more painful to walk normally, for instance).  If this is the case, then a discussion about pain relief for the joints, weight loss, or other preventative methods, could be extremely important.  Another possibility would be a neurological deficit i.e. the nerve not working, so that the patient cannot feel that they are making themselves sore.  Again, your vet may already have tested for this.  One thing I know about vets, is that we don't like not knowing the answer.  You and your vet potentially have a couple of options for getting to the bottom of this.  One, as you say, be to ask for a second opinion.  If you chose this option, ask your vet to send you to someone, perhaps who likes orthopedic or skin cases - and to check first whether they are happy to accept the case.

I have, on very rare occasions, heard of tumours that have presented a little like this.  This is something more to ask your vet about.