
Two big bills here:
My lurcher: TPLO (including primary vet investigations and rehab) £6000. Yes, perhaps a cheaper version of cruciate repair would have been available, but the initial costs at my vets for x-rays and the investigations at the referral vets (MRI) would still have been the same and were necessary. My primary vet only spotted lesions on my dog's spine which triggered the referral. Further investigations showed it was in fact two damaged cruciates causing the symptoms, the worst one was operated with TPLO - luckily so far the second one is still holding and not causing any problems. So either way it would have been in the thousands. The outcome was great, almost three years post op now and my lurcher is doing great at almost 12 years old.
My saluki: degenerative disk disease £2500. My primary vet couldn't find anything at all, nothing showed on x-rays that explained my dog's hopping at times and increasing aggression towards other dogs. I pushed for a referral where an MRI was done and a dry disc diagnosed that only slips when my dog hyperextends his back (hence why nothing showed on x-rays as his back wasn't hyper-extended then). The negative outcome is that nothing can be done and his back will get worse over time. The positive outcome is though that we know what it is, have given up agility and things like ball throwing and obedience where he hyper-extends frequently and therefore extra strain is put on his back (though he still gets free running and his normal exercise) and we can manage the condition like that and some supplements which altogether keep him pain free for now. This would not have been possible if further investigations had not been done and he would have just got worse, put on pain killers eventually and then probably diagnosed at a much later stage if ever... As it is two years after diagnosis he still doesn't need conventional pain killers (other than on very rare occasions when his back ceases up) as turmeric is doing the job nicely for now, which means no side effects to worry about just yet.
The said lurcher above also has had numerous accidents and bite wounds throughout his life (he's had over 20 anaesthetics)as well as other conditions that didn't cost thousands at the time, but usually several hundreds of pounds - none of those incidents/conditions could have been dealt with without treatment or with cheaper treatment... over his lifetime of 11 years with me, he cost around £20,000... more than I ever paid in insurance premiums.
For me, it's insurance all the way... it costs me a lot of money for my four dogs (a lot more than anyone here has quoted for their own dogs!), but I haven't got any savings tucked away that I could use if something very expensive happened tomorrow... I do still save a bit every month to cover uncovered treatment and hopefully be able to rely on my own money one day rather than insurance money!