Okay, I luckily I found this missile launcher so i was able to hurt it substantially. However it mutated (I HATE WHEN THEY DO THAT) but I dropped two bottlecap mines and it's down.
It's now on low health, but I feel so bad for it... It keeps trying to get up but is unable to
EDIT: THE ****ING BITCH GOT UP WHEN I WALKED CLOSE TO IT asdfghgfd I sprayed for my life but it was no use
Thankfully I saved it just before I decided to walk up