I really think that " ka'ari' like a lion, was absent in the original reading based on the chiastic structure that is found in Psalms 22.
• First of all :
everytime " Ka'ari" occurs in the Tanach there is always a verb attached to it.
E g :
Gen 49:9 , Nb 23:24 ; 24:9 , Is38:13 , Jer 2:30...