Okay I've had my Mignon his entire life from the time his Mama dropped him at my feet when he was just a week old nearly 3 years ago now and was the first thing he saw when he opened his eyes and i nursed him threw an illness the vet didnt think he;s survive at 8 weeks with KMR and watter every 4-6 hrs. now he's a wonderfull boy and usually well behaved whos unnutered currently because previous health weight and money issues but anyway He loves looking out the screen door This time of year and this evening I had had the door open for a few hours and he was looking out talking to the nebighorood cats when i came over to check on the pizza i ordered to see if the delivery guy was here yet anyway i rubbed his head and ears then Turned to go back and cklal the pizza place as it had been longer then their estimate and he beagn blocking my way rubbing and Puring before vocalizing and bitting me on my legg har d enough to draw blood he;s never done so before (LOve nips once in a while or slightly firmer if he;s out of foood but never drawing blood) could one of the outdoor cats that roam my nebighorhood have caused him to become agressive like that he's due to be snipped next wed i'm wondering if that will help or is this an issue i need to talk to my vet about ?