My rabbit seems to be wheezing?

my female rabbit is 10, i had her at the vet a few weeks ago and he said shes starting to feel her age, shes going blind and has arthritus. shes always lived outside in a hutch but i went out to her a few days ago and she was flopped over and took a while to react to me. ive brought her into the house now in an indoor cage so that shes warmer and comfier. she seems alot happier but is struggling to walk and ive noticed that she makes a strange noise when shes sleeping. obviously with her usually bein outside i dont know if its a normal thing for her or not. it sounds like a wheeze but could she just be snoring?