First, get yourself a coonhound, they will take care of any stray cats roaming around, or anything else for that matter.
Second, get your dog looked at, he could have some serious injuries.
Third, if you’re that worried about the cat and it’s $150 to look at... well even an expensive shotgun shell is only $1 (the good stuff 00 Buck).
On the shot gun shell remark... Are you my brother disguised under a screen name?! ;)
Dahmer...is that you??
I know we will both take a lot of heat for this but I disagree on 00 buck shot, the cartridge costs to much.
Number 6 shot at about 10 feet will just about vaporize any thing smaller than a ten pound coon.