Without examining Midnight it is difficult to give a diagnosis since lethargy and loss of appetite are vague symptoms common with many different conditions; infections, parasites (regardless of indoor or not), foreign objects, poisoning, spoiled food, injury (fell from somewhere) among many other causes may lead to these symptoms. You should ensure that Midnight is kept hydrated, but if there is no improvement you should visit your Veterinarian for an examination. Regards Dr Callum Turner DVM
An increase in respiratory rate may be an indicator of pain especially if she is limping; without examining Isabella I cannot say whether this is due to pain or another cause (infection, heart disease etc…). I would restrict Isabella’s movements and monitor her for the time being but if it continues or the respiratory rate is above 40 breaths per minute you should visit your Veterinarian for an examination. Regards Dr Callum Turner DVM
My cat Nala is just over a year old, two nights ago she expierienced some rapid breathing. It sounded as though she had a stuffy nose. She sounded very congested. She wasn’t panting with her mouth open but nether the less I began to worry and called an emergency 24hr Vetenarian. They told me to bring her in, so upon arriving and waiting to see a vet finally we were told that she “seemed bright and happy, her lungs sounded clear but she did have a little bit of referred upper respiratory noise”.
Rapid breathing (tachypnea) is a respiratory disorder characterised by abnormal breathing that is rapid and shallow. It is caused by a reduced level of oxygen, mechanical disorders (where the lungs aren’t able to expand as they should, usually due to a build-up of fluid in or around the lungs), and physiological disorders in which the cat’s respiratory centre in the brain is over stimulated.