Cat breathing loud..sides go in and out..help!!

Hello..my cat Zeus is breathing heavy!! I am struggling currently and should have been prepared for an emergency but I'm not 💔 He was seen by my vet Friday and then taken to emergency vet Saturday as well because he wasn't improving. At my regular vet X-ray was done as well as blood work. All was ok except they said there was a big hairball in his abdomen. Can that cause heavy noisy breathing??? He is eating but not as much and definitely struggling. Below I posted a picture of what was done so far... What is going on????

Hello!  Has the breathing deteriorated since you last saw your vet?  If so this is likely to be an emergency and needs to be treated as such until you are told otherwise.  Please call your vet and be ready for an emergency visit. If the vet was already aware how bad the breathing is, and it is not deteriorating, it sounds as though you need to speak to them about their findings, the meds they've given and where to go from here. Best of luck and please let us know how you get on.