Our dog Hersey (8 yrs old) jumped off the bed and collapsed.
We took him to the vet and discovered he had bone cancer that attacked his hip. That jump shattered it. The vet suggested that we amputate his leg, we did. He was on meds for 8 months. He was happy with 3 legs and so were we. He didn't make it but 8 months longer. But we loved him, as he did us. That was $17,000 well spent as far as we were concerned.
We love our pets, like our kids.