I know it sounds idiotic, but I'm worried my piggy is jealous of my other pets. Suggestions?

あなた MAY WANT TO SEPERATE THEM または あなた CAN TRAIN THEM TO RESPECT HIM <OR HER>

Try and introduce your piggy to your other pets and see if they get along. If that doesn't work, then あなた give each pet an equal amount of attention each day. If あなた did/do that already, just keep trying until あなた think あなた got it right!