I am sorry to hear this happened to Max. I am a veterinarian, and will do my best to help.
The best way to monitor if he is losing too much blood is to check his gums. If they look bright pink, that is a good sign. If his gums are pale, he is going into shock, or is losing too much blood.
He may be bleeding more from the one wound, because it hit closer to a blood vessel, or is deeper.
I would monitor his breathing. If he has to pant to breathe, if he can't breathe through his nose
, I would go back to emergency. If his gums look pale, take him back.
Will he eat? That is a good sign if he will.
I hope the worst will be over soon. Let me know how he is doing, and what else I can answer.