My Pet Alien

My Pet Alien was a strip by James Nicholas and John Gillatt which ran in the New Eagle #436-441 in 1990 and later returned in #475 (illustrated by Eric Bradbury) and finally in the 1992 Eagle Annual (same artist). It concerned schoolboy Dave Taylor, whose life is changed when his pet dog is possessed by an amorphous alien named Gleerk, who is frankly a bit of a git, constantly insulting Dave (and the rest of humanity) and seemingly giving no thought whatsoever to his hijacking of an innocent animal's mind and body. Then again, Dave himself isn't much better; he doesn't even appear to refer to the poor mutt by name...