poisonous?

[Rex1]

Hello everyone. I have 30 gal with a 4" Dempsy. Yesterday my pleco died and my Dempsy ate half of it. Since then he is not acting normal. Are plecos poisonous to other fish?
Thanks
-Brian

[VoodooChild]

No but they're tough to digest. They basically have a carapace and that won't go down easy plus he may have the pectoral spines puncturing something internal. Unfortunately there really isn't anything you can do. Just keep an eye on the guy.