Lulu may be displaying perfectly normal behavior for an increase in temperature, or she may be having a problem. Without examining her, I have a hard time commenting on whether she is okay, but if she is acting normally otherwise, you may be fine to monitor her. If she continues to have rapid shallow breathing or seems to have problems catching her breath, it would be best to have her examined by a veterinarian.
What's wrong with my poor gravy? My cat Gravy has become extremely affectionate today and has followed me outside 3x, where he never ever goes! He's following me like a shadow and meowing at me more than normal. He doesn't seem to be in any pain, but his breathing and change of demeanor have me concerned. He's breathing fairly rapidly thru his nose, and he is moving his tail a lot also acting maybe as if he is worried?
If Penny’s resting respiratory rate is above 40 breaths per minute, you should visit your Veterinarian for an examination; even if her bloodwork was good six weeks ago, something may have changed in that time. Without examining her and listing to her breathing and heart, I cannot start to narrow in on a specific cause; however the groaning is also concerning. Your Veterinarian will check her over and will treat is required. Regards Dr Callum Turner DVM