Boston Terrier who is hiding under the bed

Hi, My Boston Emma is acting really weird these days. She has decided that all her food I give her is boring but if i cook her up a chicken she will eat it. I recently acquired two cockatiels(already had a conure) and now Emma spends the morning after I take her out either hiding under the bed or laying in my bathroom away from me. I don't know what is wrong? When I take her out she acts fine. Then when she comes back in she just doesn't want to be with me. She has always been so loving can she really be jealous of new pets? Please help me with some idea of what is up