Congratulations, Mr. Rosie, on being POTD! You are BEYOND ADORABLE! (We cavies/gps!) We have had many adopted senior GPs and most of them do not whistle ... but we think it's because they know we will spoil them every day (and we do)! We are so glad Mr. Rosie has such a wonderful life full of love. Sending best wishes for a continued happy, healthy, fun, safe life, Sweetie! XOXO http://www.guineapigsrfun.net