Help for Honeys oparation

hi my name is ruth, I am starting a go fund me page for my dog honey. honey is 1 yr and 6 months old she is my best friend. today we took a visit to the vets who delivered Me with devastating news honey has petella luxation grade 2,3 severe crepitus in her right back hinde leg the petella is her kneecap and the luxation is to movement in her bone joint. the vet stated it isn't fixable unless oparation takes place to move the knee bone up to stop the luxation in her knee. the vet told me it isn't an oparation that they do it would have to be an orthopedics surgeon who would have to do to oparation and it will cost me £4000 for honey to under go the procedure to rectify the knee. I have looked at insurance for this type of oparation and as it is something that has been diagnosed it is now classed as a pre exciting condition and won't be covered by insurance. I am a mother to 3 and have a baby on the way, I have 2 artistic children that love honey very much including myself honey us my beat friend and we are all devastated that without this oparation that honey needs she will lose the uses of her leg and is going to be in pain everyday until she can no longer walk on her leg. she will get to a point were she is unable to go to the toilet. she is already limited with movement not been allowed to run, jump or walk upstairs. honey has slept by my side since 8 weeks old and doesn't leave my side. honey is my emotional support animal, I suffer with severe mental illnesses and physical illness that limits me to what I can do. honey is always by my side when I relapse with my mental health, she sleeps with me, she sits with me while I shower and use the bathroom. I am asking for help to fund for honey oparation as I can't afford £4000 without this oparation I will eventually have to make the decision to have my best friend put to sleep as it would be inhumane if me to keep her alive and in pain for my selfish needs. if anyone please can donate any money to help towards the cost of the oparation honey needs,big or small me and my family would be so greatful for your help.