Aside from all the other advice you've gotten, here's mine and it's been backed up by 30+ years of dealing with vets...
Given that it's a Pit mix these might be difficult, they have exteremely strong jaws...
1) Scissor the jaws open using your thumb and fore-finger to open the mouth and tilt its head back then literally shove the pill down its throat. Close the jaws and massage the throat to facilitate swallowing.
2) Place your grip at the back of its jaw and squeeze sharply, this should force the jaw to open (though in rotties and pits this can be a serious chore). Once the jaw is opened keep pressure on it to keep it open and again shove the pill to the back of their throat and then clamp the jaw closed and massage the throat to ensure them swallowing.
3) Grind up the pills and add it to either wet food or gravy type dry food.
#3 is probably the safest bet, but 1 & 2 will work if you're not afraid of losing a finger.
