My young female rabbit, in which has only been in my care for a few days, has been making very loud, unnatural wheezing/squeaking noises, almost similar to that of a kazoo or a deflated dog toy. She does this randomly, and it only lasts for about 5 breaths but the breaths seem stressed and uncomfortable. The first time I noticed it she then cleaned herself afterwards, so I assumed it was to do with her cleaning yet I have another rabbit who is about 11 months old and I have had other rabbits previously and have never heard this noise before, and since then she has done it without cleaning herself afterwards. She also makes whilstling noises when I pick her up, yet I believe this is down to stress and do not believe this to be serious.
My question is, do I seek veterinary advice for the wheezing noises? Or is this something to do with rabbit behaviour and perhaps she is just stressed from changing homes?
Thanks for your help!