My cat isn't eating his treats which is VERY unusual for him. He's sitting like he's uncomfortable or ready to dash. He's also making a very weird, low noise almost like an attempt at a growl or purr but it isn't quite there. I also noticed he is breathing rather quickly. The article I read here said 20-30 breaths a minute and it looks like he's doing 40 in 30 seconds. His gums don't look pale or blue. Just the normal pink. His nose is still cold too. I haven't seen blood anywhere on him or in his litter box. It also seems like he hasn't vomited at all either.
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.