My MIL's calico is in a cone, for what appears to be the same condition.
She is on the drug METACAM.

As for cone size goes, my poor foster, Malfi, had a size 15. He couldn't support his head enough to walk. With a broken rear leg, he was top heavy, and just tipped over with it.


Please give poor Ebby and kiss and tell her to: hang in there, girly.