My plec was well fed and was about half the size of my sen. He was an A-hole. He always followed my sen around and tried sucking his slimecoat. I thought they were playing until I figured out what the plec was really doing. I got rid of the plec as soon as I found out that plecs were bad for polys and why they are so bad. I wouldn't risk your poly's health if I were you. Poly's are virtually indistructable ...... unless they have no slime coat. I definately wouldn't risk it.