Weight loss

My sister dog is skinny so skinny you can see his hip bones he was sick blood about 2 weeks ago then 2 days ago blood in his stool, phoned leads of vets finally got him seen £500 later xrays and blood tests no answers at all just antibiotics and prescription food, any idea what could cause this please.

Hello!  It sounds extremely frustrating, having to go through more and more tests and still not getting a diagnosis.  I have always hated being in this position as the vet too, because we can never be sure before the next test is done, whether it's going to yield a positive result or not. However this doesn't necessarily mean that your vets aren't doing a good job.  They will have started with a long list of possibilities, perhaps including pancreatitis, hemorrhagic gastroenteritis, various bacterial diseases (hence the antibiotics I suppose), cancer, severe parasites, clotting disorders etc etc and may have crossed a lot of their list. However, finding 'what it is' isn't always the priority in this situation. Your vets may also need to keep an eye on a vomiting dogs' hydration, blood loss, temperature etc and spend a lot of time and resources keeping them stable and safe.  They also need to make sure that it ISNT certain things, which may need to be diagnosed or proven negative quickly (eg for safety / disease control reasons eg parvovirus). It sounds to me as though a conversation would be useful at this point.  Questions such as:. What has been ruled out?  What possibilities remain?  What efforts have been made to keep my pet stable?  May paint your vets' efforts in a more positive light.

Another good question is, 'How many dogs do you see in this position that get better?' I think that the answer to this may vary in different parts of the world with different viruses / parasites and different levels of care / facilities available.

I have seen dogs with bloody stools (I'm assuming that this is fresh blood) do extremely well and extremely badly.  I have no idea from reading your question what severity we are talking about, or what results you and your vet are expecting here.  Best of luck with everything and I look forward to hearing how you get on.

Pic of sick sorry, will ask for a pic of dog tomorrow he sleeps all day but does get excited when it walk time or people visit the home he just not himself

Hello!  If that's the colour of the vomit, a vet would be a good idea sooner rather than later.  All the best and please do keep us updated.