My 7mnth old veiled cooper has recently aquired a lil black dot on his back left knee.he's also been sleeping low to the ground the last couple nights,nor eating his crickets.although he will eat worms,super/butter/silk. the reason for my concern is usually i reach into his tank and he'll crawl right on,last few days tho he's started hissin with a clicking sound.and looking very pissedd and puffy and lookin as if he wants to bite me,lol