Dog has laboured raspy breathing

13 year old Border Collie, unspayed.    Bloods all completely normal 3 days ago.   Recently put on Rheumocam for arthritis issues that caused collapses/fainting (no loss of consciousness, or twitching/other seizure related symptoms).    Yesterday night, noticed that her breathing seemed faster and more shallow than usual. today she seems to have developed a "raspy/rattling" breathing. Otherwise seems completely fine so a but at a loss because i don't have a tonne of money to go through loads of testing so I'd appreciate any advice.

I do have videos of what her breathing sounds like but I am unable to upload on my phone.

Hello - and I'm sorry to hear that you and your collie are going through this.  Faster, noisier breathing can simply be down to pain eg arthritic pain - this is easily overlooked and may be relatively easy treated.  However, other possibilities may include womb disease; heart disease, which can put fluid on the lungs; an internal lump or bump that is bleeding (and thereby affecting Oxygen carrying capacity, making the patient gasp to breathe more); fluid or inflammation on the lungs;  fluid or air in the area outside the lungs (so that the lungs can expand less); lung cancer;  metastases from elsewhere in the body; severe parasitic infestation, pneumonia; lungworm; an inhaled foreign body or allergen and so on.   The way that your vet would separate all these possibilities, would be to listen to the chest very thoroughly with a stephoscope and try to establish where in the breathing anatomy the sound is coming from.  They can often inexpensively spin down the red blood cells to check that they make up about a third of the blood's volume and check the temperature, for example.  They may be able to offer drugs or even Oxygen if required to make things more comfortable without a scan etc.  However, in order to try to reverse the problem, it is often helpful to know more about what the problem is.   My tip for dealing with vets at difficult times is to be open;  it's ok to say, 'money could be a problem.  Can you tell me how severe this is likely to be?' - they should appreciate this.   'Can you tell me whether there could be a way to just keep things comfortable?'   Or 'what would you do if this was your dog at 13 and you couldn't afford more than X?'   I hope that you get to the bottom of the problem but most importantly, I hope that you can keep the patient as comforble as possible.  You are hopefully already aware that breathing problems should be treted as emergencies until their urgency is understood.  Wishing you both all the best from here.