mine complain when their nails are too long, it gets uncomfortable for them to walk I've accustomed my cats to enduring this, since they were kittens or since I adopted them, I find that the implements usually sold for claw clipping don't do a quick smooth shear, so I use wire clippers from the hardware store, the kind you might use to make jewelry -- that blunts the claws slightly yet cat has plenty of claw to climb trees, defend self -- front claws only of course -- human nail clippers don't do the job cleanly either could it be that your mild mannered cat became aggressive through fear or pain, and lashed out
1 2 3 "B Vitamins in the nervous system: Current knowledge of the biochemical modes of action and synergies of thiamine, pyridoxine, and cobalamin"
After that, you need one every month
Can I get enough B12 without intrinsic factor by eating more B12-rich foods
Naito, Y., Uchiyama, K
Always talk to a healthcare professional to find the best prescription vitamin B12 injection plan for you