Sorry to hear your bad news mate, I had a bull cross until june last year, she got bumped by a car, took her to the vets and she seemed fine just a few scrapes, after 2 weeks she was still limping slightly, took her back to the vets and they x-rayed her front leg, they showed me the x-ray, looked like a white orb round her front leg, vet told me it was bone cancer.....couldn't believe it!
I had the option to take her leg off or leave it, life expectancy wasn't much different with leg on or off, said she had between 2 to 6 mths, she went to sleep for ever exactly 2mths to the day of being