Oh Libby,
I am so Sorry....Godspeed to the Rainbow Bridge,Sweet Briggs...

BTW, If a Large Animal Vet is telling you to get a gun,They should be Reported the the American Veterinary Association...
They are Not Vets!!!!
They are Yee Haws!!!! And their License should be Challenged!!
You can always call the University of Gainseville...Large Animal Center...They can give you Names and Numbers to call

I am Sorry for your Loss & the ain that you had to endure...

R.I.P Sweet briggs!!