Infraction: 1. All posters are to make an effort to communicate clearly.
Message to User:
Don't post multiple posts in a row please. Edit post is your friend!
Your pet should not be dying if it's managed properly. There are no encounters that I know of where a pet death is unavoidable.
FYI: Try using a Devilsaur on Sarth or Heigan. Their hitbox is larger than their safe zone. And it's just worse (if such a thing is possible) when the Devilsaur uses Monstrous Bite and BW. The only proper pet management is to not bring that pet out.