My cat is hiding, breathing hard, and has a large lump. Is it serious?

I strongly recommend a urgent vet check up as her condition appears to have deteriorated with the increasing heart rate, breathing and lump. It is likely xrays will be required to determine the underlying cause which may be a hernia or collapsed lung which can worsen days after an accident. The eye should also be reexamined as if there is damage to the back of the eye it may develop painful and progressive glaucoma (increasing pressure due to bleeding etc) which may require removal

It sounds like there could be a few things going on with Whiskers. He could have a respiratory infection causing the heavy breathing, cough, and sneezing. The bump could be a growth, either benign or malignant, a cyst, or a lipoma. I"d have him seen by a vet for these problems to have this diagnosed and treated. Best of luck.

Increased respiratory rate can have several causes, including anemia, pain, heart disease, or lung disease. If you can see the abdomen moving when she breathes, I would be very worried. I would recommend that you have Kiku examined by a vet. They may need to diagnostics such as blood work or x-rays, depending on what the exam reveals.

If you are concerned that Jet's breathing is at all labored, or that he seems short of breath, he may need emergency care. I don't know what is wrong with him and unfortunately theres no way to tell that over the internet. If he seems to be breathing ok, and he's lethargic but responds to your voice and is able to rise on his own and support himself (pick him up then set him down--does he just flop where you put him or does he try to right himself and get his feet under him) its reasonable to wait until morning. However, if Jet is having trouble breathing, if he is open mouth breathing, if he's not responding when you talk to him or gently nudge him, then you need to try to get in to a vet tonight as it may be life threatening. Again, unfortunately I can't have a good idea of what is causing the problem without seeing Jet in person. Keep a close eye on him, I hope he is seeming to be a bit better now.

Your kitten needs to go to the veterinarian right away. The sudden appearance of a sac-like object under the skin could represent a hernia, rupture of the abdominal wall or even a prolapse and displacement of the bladder. The heavy breathing is likely indicating pain. Have Peaches examined right away. I hope they figure out the cause quickly!

No, I recommend to have Harlem examined immediately. This could be an emergency situation. When pets suddenly develop a change in their breathing pattern, they need to be examined immediately. This is especially true for cats who can hide signs of heart disease and not have any murmurs or other clues on physical examine. Other causes include infection, asthma or fluid in the lungs. Have him examined right away. Best of luck and please feel free to post any additional questions.

This is an emergency. Your kitty could have a severe allergic reaction, or a snake bite or serious injury (maybe because of a collision with a car). He needs to be seen by a veterinarian right away. Please take him to a PetEr right now as this sounds life-threatening.